Joel Spolsky has released StackOverflow to replace the current WordPress forums (powered by bbPress)
I’m also frustrated with the slow pace of work on bbPress, but “replace” what? The Stack Overflow folks have simply launched their own WordPress support (questions and answers) site, using their own technology platform, Stack Exchange. How does that “replace the current WordPress forums”?
FWIT, I run a WordPress support site using PHPBB3!