Another idea Haibane and I have bounced around a little is a freeform game set in Rokugan. For those who don't know it, the Legend of the Five Rings setting is a fantasy version of Japan (with a few elements of other asian settings included). The PCs would play samurai from one of the clans. With the 4th edition of the rules just out, it's got me interested in playing it again, and maybe trying to run the City of Lies again. Playing it freeform would need a little time to set up, but I think it could be doable.