I'm thinking it be different from a job board.. the 37sigs board has good jobs, but how can you be sure the people that apply are any good? Also, people there don't post projects so much as just generic posts to hire people. Interesting to consider the differences in the model...
I'm figuring out a service that'd let you get quality work, easily, outsourced, for things like html+css, page design, logos and such. http://sourceitgood.com/ has some details, love to get feedback!
"Our approach: only approved providers on sourceitgood."
A good thing IMHO.
The problem with rentacoder, guru and other outsourcing websites it that there is, maybe, 95% of bullshit on them (from both sides of the game).