OpenSocial disenchants

I am not really a keen user of socaial networking sites, but I believe that they intrinsically carry a lot of potential to alter/compliment most business models on the web.Like I mentioned in an earlier post, the biggest challenge right now is that social graphs are locked inside sites that own them and thus expanding/harnessing them across these various sites is not a possibility.
I was actually hoping OpenSocial to solve this problem but was disappointed to find out that it is nothing more than a means for developers to build apps which are cross-portable on various social networking sites.
So I guess we are still a long way from USN (Unified social network) or to and fro data pollination on the social graphs.