The BGM packs are up on PSN today.
The hard rock, dance and jazz tracks are $5 each BUT they also have a classic pack which is only $2, and replaces all the music with rearranged classic KOF music.
Here are some of the tracks:http://www.neo-geo.com/forums/showpost. ... stcount=26
I don't play KOFXII at all, but I might buy it just for the lulz.