I got in my own DJ collection the Ambassador of Funk's 12" "Super Mario Land" single (as heard on the Super Mario Compact Disco CD) and also a record of videogame breaks that including songs and sounds from Sonic 1, Castlevania 3, Donkey Kong, Joust, NBA Jam, even GTA.
Technically, not videogame soundtracks, but cool nonetheless.
Yeah, I hope to get me a set of those too--whenever I get some fundage...There are several software/hardware bundles that let you do that: Native Instruments: Traktor Scratch and M-Audio's Torq in addition to Serato.