How can you consolidate when your friends/contacts are strewn far & wide?

On the Web, everyone upgrades at different rates.   You find a service that works, a site that's comforting, a go-to bookmark that you can lay hands on and you stick with it until you hear about something better, something that solves a problem you didn't know you had, something cool that your friends are trying and you want to be a part of it.  And then you move.

Sorta. 

You can't completely ditch the old stuff or embrace the new.  You hold on to evite because your contacts are all there and you know all your friends -- yes, even the ones who are waaaa-ay tech-phobic -- know how to use it.  You stay with bloglines because it's still meeting your needs and you'd have to pick up all your data, move it, and get comfortable again and that seems like too much trouble.  You keep the ancient hotmail account because a few friends still have it in their email address books and you don't want to miss a shout-out.  You don't insist that everyone you know start using plaxo because you're not sure it'll be there next week & you don't want to be the geek that made them sign up for yet another thing.

Maybe you're the one pushing the change or maybe you're the one being pushed.  It doesn't matter. On either side, you're still stuck with the service, the site, the reference until everyone you need who's also using it has moved.  Or not.