http://www.googlesharing.net
U.S. State Dept. funds cell phone app for democracy activists-- to send alert and wipe address book, for use before their phone is confiscated by police.
How much you want to bet the U.S. government asks this not be allowed on U.S. cell phones?
Facebook makes it really easy to impersonate someone: http://techcrunch.com/2010/10/10/being-eric-schmidt-on-facebook/
Facebook is a business, and Facebook only cares about your interests up to the point where they can study them and profit from access to them. That is why they allow you to "connect" with things. Any benefit you receive is purely incidental.
Related: If you're in California's bay area, don't miss Drupal Day on Friday May 3, a special open session of NewsTools2008's mixing up journalists, technologists, entrepreneurs.
Journalism's charge is to increase the signal to noise ratio.
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