The White House plunged deeper into the world of social networking Friday, creating profiles on MySpace, Twitter, and Facebook. The new accounts join existing White House ones on Flickr and YouTube. A quick glance at the profiles shows that they mostly just link to or copy entries on the existing WhiteHouse.gov blog, but they welcome comments and are quickly gathering thousands of fans.

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Earlier this week, the General Services Administration reached agreements with several social-networking sites that resolve legal concerns on issues like advertising, endorsements and liability. That means even more federal-government social-networking profiles are likely on the way.