US Congress Page in WashPost

I still remember the days of cutting out articles, finding primary resources, copying them all and trying to do it so that it was only a day old.  Now we have Internet resources such as this one from the WashPost which lets you look at the voting records of members of the US Congress.  Additionally you can see when the member is up for re-election and what their partisanship is for voting.  It would be a great resource if you wanted to say, compare swing Senate or House districts of the US Congress.