To answer the question about format of the room - it's basically a drop in and find something to play sort of deal. If you need someone to play with, there will probably be someone there, and if you want to join a game about to start, they will probably need another player. If you don't know what you want to play, ask us staffers for a recommendation. That's why we're there (well, and to play games all weekend ^_^).
Games-wise, Settlers is likely to be there, and so is Munchkin, but you are always welcome to bring a game if you have it, and if you don't need it, either leave it in your room, or leave it in the boardgaming room for others to play (just make sure to put your name in it so we know it's yours and come back for it before we close on Sunday!)
And if a particular game you're looking for isn't there, any one of us oh-so-friendly staff can probably point you to something that may be new to you but you may like it too.
Regarding doing a D&D session, I would also say it would be a good idea to run it by Pyro. Would it be the sort of thing where anyone could join, or just the folks you regularly play with? How long of a session would you be running? These would be the sorts of questions he would probably want to have answered.
If you send him a note and don't hear back, drop me a pm and I'll follow up with him.
And I think he may not have all the Munchkins in the world anymore. They've replaced a lot, but there are still some gaming holes since the house burned down, and I think Munchkin kind of fell into that hole. Maybe I'll bring some of mine. ^_^
