I'll be at Historicon this year--just reserved my hotel room for Friday night (since parking is going to be a nightmare, I'm coming down early in the morning on Friday, and going home Saturday night). I've been to the con a couple of times, and yes they do run games that are other than "historical" games, although the historical-themed games far outnumber the non-historical. I've seen Lord of the Rings games, Battlestar Galactica games, and they also always run a Battletech grinder (in addition to more advanced Battletech games). If you've never been to the con, it's pretty awesome. They also have a helluva flea market--if you're looking for armies for different war games, or old models, or military history books, or military memorabilia, check out the flea market. And they carry all sorts of variety--I got a 1/350 scale NX-01 Enterprise from the Star Trek Enterprise TV show for 45 bucks a few years back. They'll also have a dealer hall.
Aaron, I'd be glad to help out with the DW table. I promise I'll get as much of my FSA painted as possible. I also (gasp) just picked up the French starter set, so maybe I can bring those as well.
Keep me posted on your plans.