Scoble's thesis seems way off. The problem with MySpace wasn't the technology, or even the site. It was the users of the site. It became a place that people didn't want to be associated with, while Facebook became that place. If MySpace instantly could flip a switch and turn into Facebook (codewise) hardly anything would have changed.

MySpace's problem IMO wasn't technical at all. They built a service that focused on users most likely to move, and repelled those most likely to stick with a platform.