I saw your post on Page 6; lest you think no one would notice this thread, I check this thread at least a few times a week for updates

It's a really great idea. I haven't found anyone to play multiplayer with yet, but I'm enjoying the hell out of single player. It's really fun to try all the different classes and it's a full playthrough is pretty quick -- really encourages you to experiment.
One note is that I recently installed Windows 7. It still runs (unlike the other report) but none of the transparencies work; that is to say, all the sprites show black where they are supposed to be transparent. Weird, I know. Probably a video driver thing, I don't really expect you to fix it. It's still playable, just kind of ugly now. It used to work fine on Vista. Let me know if you want me to try anything.
EDIT: I just found out that running it in compatibility mode fixes the issue!