if facebook is able to continue on their mission of "connecting" people and using the registered folks to figure out ways to make it useful, i am sure they will

if facebook is able to continue on their mission of "connecting" people and using the registered folks to figure out ways to make it useful, i am sure they will be around for a while. maybe if it became less "buzz worthy" (ie, teen-focused) and more boring/pragmatic, it could find even more uses for the network and ways to be ubiquitous for a long time. seems like they could displace a lot of firms out there - linkedin being an obvious example. (i know everyone has linked in in a different mental box than facebook, but that could change.) of course - no company lasts forever. very few companies sustain for 30-40+ years. it's not necessarily a reflection on "the company" that this happens, virtually every company is flawed in some way and time exposes the cracks and can break it apart.