I wonder how many visit on a regular basis?
anywho, I trust these forums more then I trust some other websites (though I've never checked out most other website forums).
One thing that IMHO can be done to attract more users to these forums is to make one forum for highly technical discussion.. things like, how exactly compression works (or new ways of compressing the data), or how video cards work (or certain techniques of doing things on video cards). The more knowledge that is shared on these forums, the smarter the population is (hey I learned ALOT from BenSkywalker and DaveB3D), the better!