This Day in Tech: Obama appoints Twitter CEO, plus Google foes

Too busy to keep up with the tech news? Here are some of the more interesting stories from CNET for Friday, May 27.

Obama appointing Twitter CEO to advisory group
Twitter chief Dick Costolo will join the National Security Telecommunications Advisory Committee. Microsoft's Scott Charney and McAfee's David DeWalt will be appointed too. More

Microsoft to showcase new tablet OS next week?
Software giant reportedly plans to take the wraps off a new operating system next week, perhaps running on hardware using Nvidia's ARM-based Tegra processor. More

Zuckerberg: Privacy anxiety is fleeting
New features may initially give Facebook users a fright but quickly become the norm and what people expect to find, Facebook's CEO tells audience at G8 forum. More

Top Google standoffs, from Apple to Yahoo
As the Web search giant grows, it's gathered an ever larger legion of enemies, from governments to rivals to onetime friends. More

Was Napster or iTunes more influential?
The top few may be easy to name, but how would you round out the field? Read our picks and then decide for yourself. More

Selling old gadgets: Buy back services compared
We take a look at a few services and retailers that will pay you for your old gadgets. More

How-To: 5 secrets of Google Docs
If you want to word process in the cloud, Google Docs is what you need, but let us make the experience better by revealing five surprising secrets the program has to offer. Learn the tricks. More

Reporters' Roundtable: The bubble episode
Are we in another tech bubble? LinkedIn went public last week, raising $352 million. The stock quickly shot up, igniting talk that we are entering another period of tech market froth, like we had in 1999. Are we indeed? And if so, is it good or bad for Tech. CNET's Jim Kerstetter and HBR's Eric Hellweg join the discussion. Watch

Video: Still cameras for shooting great video
Five digital still cameras that will make your forget your video camera. Watch

Nike+ SportWatch GPS
For runners looking to keep track of their workouts, the Nike+ SportWatch GPS offers a very attractive and simple solution, but it's on the pricier side. More

And special for the three-day weekend:

Conquer the night with an LED grill light
The LED Barbeque Grill Light mounts to a variety of surfaces. The light lets grillers keep grilling well into the night. More

Hit the backcountry this Memorial Day, Android-style
Field-tested apps and tips for using your Android device on the trail, even beyond roaming range. More