[Dailytalker]

Before bbpress I used SMF (Simpe Machines Forum) http://www.simplemachines.org/. SMF is also open source and it offers much more features than bbpress and it has much more developer. I changed to bbpress for two reasons:

I searched for something which I could better integrate into wordpress and I thought that wordpress and bbpress are more SEO friendly than SMF and Tinyportal.

When I changed from SMF to bbpress I lost about 50% of my previous forum members. It’s because bbpress doesn’t offer as much features than SMF. Some members complaint because of this, thats why I know it.