The Vienna University of Economics and Business administration is making a study on Crowdsourcing (see my first post on the issue here). The study, to which I contributed, still isn't available, but you can read a summary of the research in this PDF. Eight crowdsourcing communities were analyzed, including SellABand (my thoughts on SellABand here). This summary doesn't give much juice about the matter, specially if you're into the concept of Crowdsouring, but yet it seems a good resource, specially for those thinking about being in the crowdsourcing market. Most of all, the summary promises that the research, when available, is a must read.