Evan Williams says Twitter fundamental to government
news.bbc.co.uk
news.bbc.co.uk
If nothing else, the Obama administration seems to agree with William's comments. They have publicly signalled the importance they attach to Twitter (e.g during the Iran election trouble last year)
Twitter is currently the simplest social network we have. Unlike Facebook, which wants a profile and is built around aggressive network-building, Twitter requires zero initial effort. You join, you start publishing, and people either find you or they don't. I see the Twitter angle on this, too.