Well,
If you are looking for an open forum in
Java, directed towards a public usage then JForum seems to work quite nicely and I'm sure Rafael would appreciate and support an accesible interface.
I'm working on another kind of forum, more directed towards private usage, and one of the requirements was that it had to be AA compliant, so when I'm able to show the interface, soon I think, I hope you can get some ideas from there. Then it would be a matter of tweaking the JForum templates to produce AA compliant HTML. Not an easy task, but I could not find an already built forum with such an interface.
[originally posted on jforum.net by GreenEyed]