I just did an initial pass of Unreal (
http://www.unrealtechnology.com/html...old/home.shtml). I think it would be cool, but check out licensing (
http://www.unrealtechnology.com/html...ng/terms.shtml). The e-mail (for anyone brave enough) is
licensing@epicgames.com.
I think we won't be able to go open source, to say the least.