That is a great service! Thank you for the link!
However, its not quite what I want - its really focused on tiny jobs, They won't do anything if it takes over 30 minutes, and I don't think they'll create anything (e.g., a banner ad), only modify something you already have.
I'm fine with a job taking 2-3 hours and billed accordingly, its the latency and overhead of finding/scheduling these small tasks that sucks.