Well, to respond in part, I was completely surprised that they had another showing of Piano Squall. :P
Other than that, there are the comic auctions, which are fun to participate in, and there was the cosplay chess.
Unfortunately, I got stuck with certain people I would rather not have been with, so I couldn't tell you... but I was at Anime Boston on Sunday this year, and it is just as much fun. Connecticon is the same; it is a lot of fun on Sunday. It just ends earlier. ^^