How Progressive is Your Representative/Senator?
One of these days I'll have another half-original thought, but until then, I'll point you to a really fascinating site, which rates all Congressional Reps. relative to the "progressive position" on every vote cast. Of course, there are problems to that idea, like who gets to decide the progressive position?? But it's still interesting, and offers an automated, thorough approach, not the more politically motivated efforts of issue-groups. Also, breaks down by issue, and allows you to see every vote used to base the percentage.

Congressman Jim Cooper, representing Nashville, votes progressive 67.12% of the time. But my rep, Marsha Blackburn, whose screwed up district boundary covers a sliver in Southern Davidson County votes progressive 1.46% of the time.

Check it out: Progressive Punch