Some first thoughts...
So in terms of functionality - would it include a bug reporting system as well?
Practically, could it transform a forum into a bug reporting portal? When creating a topic, you get a predefined form to fill out, as designed by the admin.
The ability to perhaps query certain data from users - let's say operating system, or browser, software versions,... (as variables) which then get stored in the bug tracker and could be used to later search the bugs.
Bug status (submitted, assigned, completed, won't do, can't reproduce),... with visual feedback (icons) that are visible in viewforum?
Bug severity (minor, major, trivial, cosmetic)
When fixed, assign a version of the software that fixes it (so you can automagically create change logs)...
Sign me up for testing