Dolby Laboratories confirmed formal support for both the PS3 and Wii last Friday. The Sony PS3 gets Dolby Digital 5.1 surround sound support for games (up from Dolby Pro Logic II) and Dolby TrueHD 7.1 surround for Blu-ray movies.
The Nintendo Wii gets Dolby Pro-Logic II support (same as GameCube) which is 5.1 surround sound (where available).
For reference, Dolby Digital 5.1 interactive encoding for games is built into the Microsoft Xbox 360.
Only a Few handful of games for PS2 had completed DTS and DD 5.1, (GTA VC, SSX3..) I hoped that GTA SA would have it too but it went back to prologic
well, Now EVERY ps3 game will have 5.1 surround!! So happy to hear that:D