So I got invited to participate in the Quake Live beta. Basically, it's Quake 3: Team Arena, the last of the great pick-up-a-game-and-blow-shit-up FPSes (excepting Painkiller, of course), for free, played through your web browser. I've tried it out and it's actually pretty solid, they haven't given up much in the way of grafix (not that there was much there in the first place, heh) and it runs like butter, though it is in beta, so when I left my first match against a bot it crashed Firefox. Keep your eyes peeled for it in the future, it beats the shit out of castle defense, as web games go.
I'm going to ask around and see if I can't get some invites of my own, and then maybe some of you fine mooks can get in on it, if you're interested.