[quote name='dc snake']I thought he said he was going to retire from game development after Doom III?[/QUOTE]
Nope, in fact he is currently working on the rendering engine for id's next game (which is unannounced, but it NOT going to be a Doom or Quake game). If you want to hear some of the technical details of it you can download his quakecon 2004 talk. Only do so if you know a lot about graphics or it will probably go over your head.
[quote name='sblymnlcrymnl']John Carmack is the baddest mother$$$$er to ever touch a keyboard.[/QUOTE]
Absolutely correct.