Social networking integration

I’ve been getting into quite a bit of social networking integration recently, be it FriendFeed or Hellotxt.  I’m especially interested in the aspects of digital identity and presence notification.  I’ll post a “how I use” soon for social networking, but what’s prompted this post is this bit of news from Eileen Brown’s WebLog : Exchanging contact data between social networking sites.  It’s great that MS is pushing this kind of stuff.  This is one of the reasons that I think that MS and Yahoo! would have made good partners, they’d have had the power to join up so much.

In other news, this post seems to suggest that Google are playing with Yahoo!

What do you think?