if you like knowing what your members of congress are up to, check out this site, aimed at openness and transparency in government: http://www.opencongress.org/. once you create a profile your representatives and senators will be identified and you can create an rss feed of each vote they make. if that’s too much information for you, just create a feed to track bills you care about. if you’re only into gossip, they’ve got you covered there too, with a congress gossip blog (no profile required to grab that particular rss feed).
i especially appreciate that this site lets you involve yourself at whatever level you wish. i learned alot from its description of what congress is all about, but if you’re advanced you can navigate directly to the full text of any bill.