This assessment couldn't be further from what I think is the case: Keep building social networks -- there is a huge audience of people that love to interact wit

This assessment couldn't be further from what I think is the case: Keep building social networks -- there is a huge audience of people that love to interact with others online. Additionally, this sentiment is contrary to what drives innovation. Nickpp touched on this with his AltaVista comment, but giving up this early in the game is not only stupid but is not going to happen: The market is too young and too rich to not explore. Facebook may be a behemoth today as Yahoo was before Google. But Google innovated the shit out of one niche part of what Yahoo was doing and cornered the market, later taking over most of the parts that Yahoo sacrificed search to be good at. In the same vein, I have no doubt that there is going to be a replacement for Facebook -- it might not be a social playground or an explicit network, it could be an online reputation or identity platform, it could be a standardization of personal and social data -- but Facebook, like all things, will fade, change and eventually be considered antiquated.