I got to go to the DNC when it was in Chicago back in '96. I was in the lobby of the United Center and James Carville walked by. I said "Hey! James Carville!" He turned around and gave me a really shitty "no duh" look. James Carville is kind of a douche, though. I mean, one assumes he's married to Mary Matalin on purpose.
Other than that it was a lot of fun... but I really wish I could go to the one in Denver. I bet that'll be a blast!