This is probably a old thread, but I could not find a place to post this on jforum website. so here it is. We recently integrated jforums into our site. We found jforum so flexible and it was a breeze inegrating it into our application. We needed to write a custom SSO hook to integrate with the app and needed to skin the CSS (still working on it). I did find few minor issues, but they were not show stoppers for us. Thank you for a great product. Here is the link to our community forums:
http://www.avaniplants.com/planttalk