Opencongress.org is a website for keeping track of the U.S. Congress. (previously) But, now it also a social network. So, sign-up and see what your favourite Senator has been doing, track bills and, follow important issues. Then, share that information with your friends or write about it on your blog.
The obvious next step has been taken: An Oregon state senator introduces a bill that will expand the definition of hate crimes to include ecoterrorism and illegal actions motivated by anticapitalism. Block a street, go to jail?