"Third, the opportunity to host my own social networking server is one that appeals only to the smallest fraction of the social networking marketplace." this a

"Third, the opportunity to host my own social networking server is one that appeals only to the smallest fraction of the social networking marketplace." this argument seems really short sighted to me. If disapora takes off I expect social networking accounts will be like email accounts. There will be several dedicated hosts that serve the majority of users (like gmail, yahoo, etc.), but there will also be thousands of other smaller options (including self hosting) that savvier users choose as they see fit.