This sounds like an excellent and fun idea! I'd definitely love to be a part of it... I always enjoy sequencing and burning my own CDs anyways.
It might help though as far as matching people, to figure out who generally likes what kind of music. For example, I listen to a huge variety including classical, soundtrack scores, classic rock/hard rock, prog. rock, 60's-today's pop, easy listening, world music, and a little new age stuff. So if I were to make a CD, it would probably be selections from all those widely varied genres... but if I knew the person I was picking for liked rock music but hated classical for example, then I could narrow down the stuff I would pick from. Anyone else think that might be a good idea?