Gamania Digital Entertainment has announced they'll be publishing Japanese MMO Tiara Concerto Online, which is apparently focused on the playing of music, accompanied by mostly-naked, gun-kata performing, Native American inspired cat girls.
Oh, there are also airships, but insofar as what they have to do with gameplay hasn't yet been revealed. If you want to see more about this sure-to-be-disappointing MMO, just check out the official site here.