The other major difference is that Facebook only takes information in, it doesn't readily share it back out. So Facebook's really not about sharing information,

The other major difference is that Facebook only takes information in, it doesn't readily share it back out. So Facebook's really not about sharing information, it's about collecting information about you. There's been no winner. Facebook doesn't work well for the older crowd who mostly don't use it, and they weren't even started around the same idea. Facebook was successful because it was the first of it's kind. It's a networking application, specifically for keeping up with what your college friends are up to. It was the first to try the "social network for X" and got the first mover advantage. Friendfeed is totally different. It collects activity from the whole universe of networks and it does a better job, especially for the older crowd who has no use for the extraneous Facebook crap. There will be no obsolescence, because Friendfeed is open and Facebook isn't.