GovTrack.us
is a free, publicly available, privately run, open-government-advocating web
service in good company with such sites as Project Vote Smart and
CitizenJoe.  GovTrack debuted quietly in September 2004,
then hit the big time with mentions in
BusinessWeek
and the
New
York Times (registration required). The attention-getting feature is this:
GovTrack will send you a notice via email or
RSS feed when official legislative
websites such as THOMAS report that action
has occurred on legislation of interest to you.