http://www.rockstargames.com/sanandreas/
Great game trailers here:
http://www.rockstargames.com/sanandreas/trailers/GTASAtrailer1_320x240.wmv
http://www.rockstargames.com/sanandreas/trailers/GTASA_TRAILER2_480x360.wmv
and DON'T click this one if thr F word offends you.
http://www.rockstargames.com/sanandreas/trailers/GTASA_TRAILER3_480x360.wmv
The new Half-Life 2 looks awesome as well:
http://ftp.vugames.com/sierra/half-life2/videos/half-life2_trailer_1300k.wmv