In web 2.0 we proved that we could build a lot of little useful services for relatively cheap. I think a big part of "Web 3.0" will be showing how we bring those services together. That's already happening with services like socialmedian and FriendFeed.
Jason, I agree. I think we are looking at the "modulization of technology where users will pick and choose which modules add the greatest value and custom build their own "social portal"
@Jasongoldberg the race then will be for the startpage/service. have you checked out sweetcron? very roughly, its like having friendfeed hosted on your own site, though the number of services now are considerably lesser..
@manuscrypts -- "the race then will be for the startpage/service" -- agree -- and facebook is out in front on this in the "fun" space, tbd who wins in business / serious / everyday utility side of it.
It's the web services that offer very similar values that usually have to compete for users. I have a Rejaw, Utterli, Pownce, Plurk and Tumblr accounts but I definitely use Twitter more (I signed up here first and have more connections). On the other hand, I both use Digg and SocialMedian for various reasons. I find more value in the content and conversations here in Socialmedian than in Digg but I continue to Digg to check for random online stuff (not to converse). I guess it's a plus that whatever I Digg gets to be clipped here as well. :)
I'm a junkie, so I have accounts at damn near every social web service there is, but social|median has become sort of the hub for my news and twitter has remained the standard for conversation.