Finally got around to looking at The Public Whip, which is an easy-to-use reference site to how your own MP votes, as well as other questions/answers. Very interesting, very useful, very well coded IMHO. here's my MP.
This is off the back off an anouncement from Tom Steinberg, that 5 projects have been picked from all of the mySociety.org suggestions, and they're looking for coders for Your Constituency Mailing List.
One thing - i'm really not keen on all this "My" and "Your" stuff. It's so... patronising. "Our" might be better, but it still sounds so... wrong. Sites shouldn't try to promote themselves as separate or conjoined with the people they're trying to attract. It's backwards.