I think it's a lot like the Microsoft Office problem: for a long time it was hard to get data out, everyone you knew was using it, and significant mindshare and

I think it's a lot like the Microsoft Office problem: for a long time it was hard to get data out, everyone you knew was using it, and significant mindshare and investment had been built on top of the original solution. OpenOffice proved that it's possible to break free, but change may come at a glacial pace. Competitors need a push-button way to get data out of Facebook, they need to match most features, and they need to be free. And, they either have to convince 30 of your friends to switch, or make sure that you can still interact with them perfectly if they choose to stay on Facebook.