Friends
Rémi Gillig, game programmerLaurent Martin, sound designer
Ronan Kergosien, graphics designer
Artificial Intelligence
AiGameDev.com (useful sandbox for members only)
Game design
Experimental gameplayGraphics programming
Beyond3d.comDevMaster.net
Wolfgang Engel's graphics diary
Siggraph's papers(not only graphics)
General programming
GotW.caDr Dobb's
Games From Within
Realtime collision detection blog's
MollyRocket
CellPerformance
Bungie R&D
Insomniac games R&D