Yeah actually I have.
I am down as an employer and also "for hire" as well.
Its not all per hour. You can get fixed qoutes for projects too.
Another one I use is guru.com
What I like about guru.com and Odesk is the the escrow service where you get your money back if the person(s) does not perform 100%
These two are pretty much the only two I use as getafreelancer.com and other places are very poor quality (easy to get scammed too!)