Another issue here is that IMHO all the best teams are formed organically (e.g.: Google Guys @ Stanford / FB Guys @ Harvard etc...) and not out of a direct inent to form a startup. As we all know running a startup w/ a co-founder is like being married. 1 issue that this site could run into is that just like on dating sites its very difficult to establish a significant amount of rapport and I would argue that having a good rapport with your co-founder is just as important as having a good rapport with someone that you want to date. Instead of using a site like this you should look around and determine which of the people you know and like would be the best fit in the role of co-founder. Something like Facebook or linked in would be a good place to search your network for potential startup co-founders. Or if you are like me you just start a project and annoy all your friends to test/review/help etc... so much that they either stop talking to you or become your co-founder.