Warning: On-topic post.
Another idea for making a graphics request forum more rewarding to graphic designers (and to possibly help them get paid graphics gigs), would be to create a simple system, where the designer who fills the request can submit the finished work at the end of the thread, and the original requester has an option to select them as the person who completed the job, then in the designer's profile, have a section similar to the hacks section, where it lists all the design gigs the person has completed, with links to the threads and the finished graphic. If someone is looking to hire a designer, it would give credibility to the designer. This would also motivate the designer to fulfill requests, since there is a "formal" system, along with the benefit of a 'portfolio'.
Hopefully I explained myself right