Although your 100/hr minimum rate does cause me a bit of concern. I'd find it difficult to justify that rate for most of the work I do, which is PHP and javascript development.
For me the $100/hr minimum is an excellent filtering mechanism for serious clients. As a consultant I think there's a place for this, a place for Elance, a place for Odesk, and a place for AWS Mech Turk (AWS's horribly named labor market).