I've been playing a lot of internet chess lately. This post is to organize my head and catalog some of the links that I've found useful.
Let's start with a list of decent places to play online (this list will be updated over time, as appropriate...please share additions in the comments if you know of any)
PLAYING ONLINE - WEB
http://chess.com - for correspondence and live chess. Supports classic chess and Chess960, aka Fischer Random Chess. Web apps and iPhone apps. Tactics training, and "chess mentor" a sort of programmed instructor.
http://chessclub.com - Live chess only. Desktop and phone apps.
http://redhotpawn.com - Correspondence chess site with vaguely obscene name.
http://queenalice.com/ - Correspondence chess. Haven't tried this one.
http://gameknot.com/ - what is this i don't even.
New York Times "Wherever You Are, a Game Is Just a Point and Click Away"
Bobby Fischer Against the World - good documentary on the controversial grandmaster.