The recent elance, odesk, etc discussion[1] had a very good rundown on the positive, and negative, aspects of the freelancing sites you mentioned, along with so

The recent elance, odesk, etc discussion[1] had a very good rundown on the positive, and negative, aspects of the freelancing sites you mentioned, along with some additional niche sites. [1] https://news.ycombinator.com/item?id=6350201 https://news.ycombinator.com/item?id=6350201