I'd still love to see this happen, but it needs a team of at least 5 people - 2 coders, 2 graphics artists and 1 music/sound guy. And I don't see them volunteering.
I could make some music for it, i already make some weird stuff anyway....
http://soundcloud.com/stefano-de-monte/riding-with-thundermaking medieval music is a bit though as i don't have the instruments, but i do have some shaman drums, egyptian tabla, some ocarinas and a bamboo harp that could do the trick or come close.
All i need is a clear idea of what kind of tracks you need and what kind of emotion it should give.
PS: i think we had this conversation before, i posted some sound tracks as well, about a year ago or more.