There have been plenty of promises over the last year but it more often than not turns into a big flame war on their discussion forum.
I think flame war is a little harsh, infact the thread Matt reffered to in his KeyNote speech (called a "flame war" by WPtavern) can be found here: http://bbpress.org/forums/topic/whats-happening-with-bbpress/page/5
The world's politest flame war ever?? It appears to me to be really a civilised conversation including 2 moderators and the lead developer who can't get any information out of the project lead.
Look at all those people using such bad language like "please", "thank you", and "appreciate". Scary stuff. It's amazing what people write behind the anonymity of the internet.
I would love to hear from anyone inside wordpress about some concrete info surrounding bbpress including release dates, beta testing, new features, etc.
So would the bbPress team ;-)