Yes, I made a bulletin board bundle (in fact these things were my first textmate bundle items, so they're probably somewhat shitty with out-of-date scopes, etc.). It doesn't have too much functionality, but it should do reasonable syntax highlighting, and things like cmd-b for bold, etc.
Yes it does work very well. I was just thinking that it would be something cool if the Bundle could handle these things. So that editing is a little more comfortable.
@Niels: I have the Bundle already installed! Thanks for your information ;)