I came across this great site last night. It is part of the Washington Post, and it allows you to track your (and everyone else's) congressperson and senator. You can learn information like how many votes did that person miss, how often did they vote with their party, and how did they vote on key issues (and every issue as a matter of fact). The more you drill down, the more information is there, including biographies and district demographic data. Fascinating!
Congress Votes Datatbase
Congress Votes Datatbase
