I like to see some activity on this project, read the IRC chat, here my $0.02:
1. I like the idea of better integration with WP I’m actually looking for a solution with wordpress + bbpress, I don’t mind if it’s a plugin for WP or a standalone, thinks I would like to improve are: users (single profile page, authentication -openid) and themes.
2. I like the widgets idea for bbpress.
3. I think TinyMCE should be optional.
Looking forward to get involved in this new wave of bbPress.