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Twitter calls Google (GOOG) a "good role model," but says it isn't ready to rush down the road to advertising.

Nonetheless, an ad-based revenue model is something that cofounder Biz Stone says they "will be looking to do down the line." But, for now, he continues, Twitter is focused on "creating value for our users." For now, revenue generation ideas are being put on paper, "and we're definitely going to get to them," Stone says.

Take the Nook off your Christmas list. The new e-reader from Barnes & Noble (BKS) has already sold out, and more won't be available until after the holiday has passed. The next batch will be available, at best, by November 4, 2010.

In a statement, the company said, "While we increased production based on the high consumer interest, we've sold out of our initial Nook allotment available for delivery before the holidays." If you still want to give the device as a holiday gift, Barnes & Noble will give you a gift certificate to tide the recipient over until the device itself comes around.

Google (GOOG) is letting a few developers peek behind the curtain. The early look the company's new operating system, Chrome, is happening in true Google style: by invitation only. When it's released, which should be in time for the holidays, developers will be able to bang away at an open source solution, tapping an army of volunteers who are eager to work for bragging rights.

The open source version is called Chromium OS, which will hit the market a year before the "consumer" version is ready, which is how Google will be able to tap the wisdom of developers around the world. In a blog entry, Google explained, "This means the code is free, accessible to anyone and open for contributions." The project includes the code base, user interface experiments and some preliminary designs, all of which can be used for ongoing development efforts. To energize the potential base of contributors, Google said that "development will be done in the open from this point on."

Yahoo! (YHOO) is the latest company that wants to optimize its search results for Twitter. This follows moves by Microsoft (MSFT) and Google (GOOG) to integrate Twitter data into their search results. Unlike its competitors, however, Yahoo! wants to do this without spending a dime (well, without giving a dime to the hot new social media platform).

Twitter's microblogging service has become famous not only for its rapid growth but also because it's found no way to turn it into revenue. Its recent discussions with Microsoft and Google demonstrated that Twitter can indeed bring in some cash -- by licensing its data for use in fine-tuning search engines. With two of the top search engines now optimizing for Twitter, it was only a matter of time before Yahoo! would rush to join the party.

TheStreet.com's Jim Cramer says traders who focus on the negative will pounce on this poor report.

Thanks for nothing, Dell (DELL) (Cramer's Take)! Given that this market seems to care less about the good like NetApp (NTAP) (Cramer's Take), Ross Stores (ROST) (Cramer's Take) or Limited (LTD) (Cramer's Take) and is focused on the bad, like the semi-downgrade from Bank of America Merrill Lynch, I am sure that Dell will be viewed as part and parcel with the downgrade.

I can't stand Dell. I actually slam it in Getting Back to Even, taking a chance that it would get its act together and make me look bad on the very quarter the book is released. Looks like that was a lot of worry for nothing.

After-hours traders punished Dell (DELL) stock Thursday, following a weak third quarter earnings report from the technology giant.

Going into the afternoon earnings release, analysts had been expecting to see the company show earnings of 28 cents per share. Actual earnings came in much lower at 23 cents per share.

Every day, it's becoming clearer that e-readers will be the hot holiday gifts of 2009. Amazon (AMZN) is obviously in the game with its Kindle, with which it took an early lead in the industry. Barnes & Noble (BKS) has made a play with its new Nook reader, applying some pressure to what was once a wide open space.

Even though we're still short of Black Friday, the weeding process has begun. Sony (SNE), which is also in the e-reader market, has revealed that it makes no guarantees about delivery by Christmas.

Once upon a time, Mac users could brag they were much safer from malicious electronic attacks. After all, in the days before Google (GOOG), when Microsoft (MSFT) was the only uber-player in town, Windows was the perpetual malware target. Phishers, however, aren't discriminating; they're just looking for an account to plunge. So, both Apple (AAPL) and Microsoft users are threatened. Virus writers do tend to focus on the Windows operating system, which owns 90% of the OS market, but phishers are platform independent.

Phishing involves attempts to get a user to reveal information about their accounts. Once the soon-to-be victim clicks that link or fills out a form, the "transaction" is complete -- no operating system interaction necessary. As a result, there really isn't any advantage to using a Mac over a PC.

Amazon, Inc. (AMZN) is in the clouds. So are Google, Inc. (GOOG), EMC (EMC) and Cisco (CSCO). Now, Microsoft Corporation (MSFT) is joining them, having announced on Tuesday its new Windows Azure cloud computing system. The new product will be released on January 1, 2010 -- a new solution for a new year.

Azure will deliver an online platform for the software development set to build their own mousetraps and provide plenty of storage space for users. Testing began a year ago, and full live version will be celebrated next year. For the first month, Azure will be free. The charges start in February.

An unemployment rate of 10.2% means that serious jobseekers are using every tool they can find. So, it's not at all shocking that social networking tools top the list, with LinkedIn, Facebook and Twitter leading the charge. Openings are being tweeted, hints of a new position are being monitored and hot candidates are being hit up directly, even if they aren't saying they're on the prowl for a new gig. Social media is a tool to use in a job hunt but not necessarily the only one, according to Challenger, Gray & Christmas. Instead, it makes sense to balance a search with many tools.

John Challenger, CEO, says, "The job search has changed radically over the last two decades with the advent of electronic mail, the internet, social networking, smart phones, etc. However, it is important to remember that all of these technologies simply enhance the job search; they will never replace the face-to-face connections that are critical to a successful search." But, he continues that "we feel that these new networking tools are essential and now advise all of the job seekers going through our program to open LinkedIn accounts and to consider other services such as Facebook and Twitter.

Imagine taking the personal connections and interactions that occur every day on the likes of Facebook and Twitter... and bringing them to bear on an education. To a large extent, this hasn't been done yet, but the potential is profound. In a new report by the Center for Community Survey for Student Engagement, two-year programs aren't taking advantage of the tools at their disposal -- plenty of growth is still possible. Kay McClenney, director of the CCSSE, says, "Colleges are not taking advantage of that particular set of tools for making connections with students to the extent that they could."

The recession has led everyone with a budget to question ever line. From households to businesses to state and federal governments, nothing is sacred. Finding new ways to get the same result without spending the same amount mean not having to make sacrifices. NASA has been under considerable financial pressure, as many question the value of sinking cash into space travel. So, it has to get creative in justifying its existence ... and in generating excitement about the agency and what it does.

When the space shuttle launches on Monday, 200 thumbs will be at the ready. NASA has deputized 100 of its top fans on Twitter to come to the launch and tweet the experience. These fans are estimated to have more than 150,000 followers, all with the potential to retweet the messages they see. Every click of an iPhone or Blackberry will give NASA more exposure, building the excitement it needs to keep the operation afloat. So, whether you realize it or not, the launch is being brought to you by Twitter, Apple (AAPL) and Research in Motion (RIMM), even if only implicitly.

BT Group, which virtually owns the UK telecommunications market, isn't waiting for Google (GOOG) to launch a full attack. The company probably expects to be under assault from the search engine (and advertising and e-mail) giant, so it's taking early action. Google Voice is still being tested, but words like "free" and "powerful" and "internet-based" are bound to inspire fear in even the most established of companies.

To protect itself from the eventual attack from Mountain View, BT picked up Ribbit Mobile, and testing is in progress. Ribbit's technology has some overlap with Google Voice and even beats it with a few capabilities, according to Bloomberg. Ribbit just launched its beta product this month. It allows either the user's current phone number or a new one from Ribbit -- which is no different from Google's alternative. The product suite is generally the same, with phone- and web-based voicemail retrieval and automatic transcriptions that can be sent by text message or e-mail. For an extra fee, BT's Ribbit does provide human transcription, though it is free during testing. And, calls can be taken directly from a computer, using a microphone and speakers.

They don't all work out. After gapping up in June, Applied Signal Technology's (APSG ) stock chart has misbehaved, which is why I'm placing a hold on the company's shares, first recommended on June 22, 2009, at a price of $24.34.

Despite a decent third quarter EPS performance of 25 cents, 1 cent below the First Call Q3 EPS estimate of 26 cents, institutional investors have continued to exit the stock, with the stock recording several dips below the key, 50-day moving average line.

Morale has plunged among military personnel in Afghanistan as a result of record violence in the war, according to the U.S. Army. A battlefield survey found that the situation is particularly problematic for soldiers on their third and fourth combat tours, and junior enlisted soldiers are most likely to experience marital problems because of deployment. Though it's not a complete solution, the study did find that limited doses of technology – either through video games or internet access – can help.

The study, obtained by NBC News, revealed that more than 20% of soldiers are experiencing combat stress, and half of them are having difficulties getting professional help. Combat Stress units in Afghanistan, the report says, are "undermanned," and this type of unit has no presence in the southern part of Afghanistan, where most of the combat is taking place.