Network map of US Congress twitterers

Someone on Twitter shared a link to this article. Very interesting. I'd tell you who it was, but by the time I got back to TweetDeck the sender was lost in tweetland and I couldn't find. Thanks to whoever it was and sorry I can't give a shout out.

Network map of US Congress twitterers
Published by Mat Morrison
on Tuesday, January 13, 2009
This is a map of the current US congressmen and women who are currently on Twitter (you can click it to see a bigger map where you can read the names.) The direction of the arrows show who follows whom, and the size of the blobs indicates how “popular” a given congressperson is among their twittering peers (where “popular” means something like “is followed by many of their peers.”) Colours indicate party affiliation (for those of you who — like me — don’t live in the ‘States and who — like me — need reminding from time to time, the Democrats are the blue dots.)
http://mediaczar.com/blog/2009/01/network-map-of-us-congress-twitterers/