As it so happens, I finished making a short Flash game just yesterday, and it now requires Atari 2600- or NES-style "chiptune" music (in keeping with its visual style). I'm sourcing music from a few people I know, but the more the merrier!
The gameplay is simple (it's a running/jumping game with pretty(?) graphics) and the levels are generally very short, so simple little pieces of looping music from 15 seconds to a minute would be appropriate. As for musical mood... anything with plenty of that energetic "fun" feel that you get from the simple games of yesterdecade. Email me at frencheroticfilm @ gmail if you want specific spoilers (or a screenshot), for your inspiration. (It's not a commercial project though, so I can't pay you for your music.)
I've tried making things for TIGSource compos before and usually failed at getting a nicely-working game, but I can assure you that this game actually works for once and I'm eager to get it out there ASAP!
P.S. I just listened to a few of your songs and many of them sound just like what I'm after. Are any of them "up for grabs", or are they already in use in other projects?