I'd also check ModPlug.com aswell if you want to have a high amount of musician traffic. Even if they do up an original track as a MOD, it's quite easy to convert them to a WAV file using MPT. (ModPlug Tracker)

Just know that this thread is improtant as it is a 'base' for all other potential musicians to come and offer up ideas and their servces. ie. place all your important links and creative peices here for the musicians to access, and post your actual requests with summarized version there.