When the social web has a well defined and widely adopted standard, then Facebook will become just another social site. In short, we need an accepted standard like HTML or RSS for social updates.
I would like to use Buzz/Twitter/Identica/whatever to post one update. And then all my social connections will be immediately notified of the update regardless of what client or website they prefer to use.
Eventually "social networking" like features will be ubiquitous and your social graph will be federated across many different sites using standard protocols. Facebook won't be anything special, but just another portal (view) into your social network experience. Unless they try to remain a "walled garden" in which case they'll be nothing, eventually.
I would like to use Buzz/Twitter/Identica/whatever to post one update. And then all my social connections will be immediately notified of the update regardless of what client or website they prefer to use.