TGM and Kestas for sure; to buy them a couple of rounds for everything they've done on this site. I have had the opportunity to meet a ton of great people (virtually I suppose) and I've thoroughly enjoyed learning about this game. I can't believe it's been around so long and I just found out about it in February.
djbent, gjdip, friendly sword, plastic hussar, BZD, babak, zscheck, lulzworth and many others that I've enjoyed playing with - djbent and gjdip +1 because they're female - I know, that's a little shallow, but I've always found intelligence, good conversations/sense of humor very attractive in women.
And a whole special, separate acknowledgement for Crazyter, who for some reason, I just really, really like.
Also, I love Maniac's post above; that was perfect; but it's ok - Crazyter doesn't have to look like Kate Beckinsale, and BZD doesn't have to be a member of Monty Python. I'd still like to meet 'em:P