Marketing Research for a new web site

We're in the process of building a web site to work like an e-lance, scriptlance, or [login to view URL], HOWEVER it isn't for computer related services as seen before. This site will be used for companies to place projects on a site for freight or loads that need to be shipped from one point to another. We have the designer and programmer in place. But we need someone to take on this project to research all the other sites that are there. Take detailed notes on the way their system is set up, the features, the services, and pricing. Compile the best of the best already out there and report back to us. Please contact me for some sites that already exist that you'll be researching.