Yes, I'll take a pass at sorting these into groups this afternoon or at least add more descriptive information. Some of the original link titles are a bit mysterious, like this one: "Voter registration data; or, HERE IS YOUR HOPE, YOU FOOLS! « The Edge of the American West"

I'm going to toss the ball into infochimps court for any deeper organization of the data, since they are already set up to handle it.

I've added static tags to each link which should help a bit, If I can find a way to quickly cluster them together into logical groups, I'll so that as well.