How many degrees of separation?

Microsoft is about to release a beta of software for peer-to-peer social groups, called Threedegrees. Here is the CNET article. (The Threedegrees website currently is only taking email addresses to notify when the beta will be out.) The intention is to extend the functionality of instant messaging, and to create trusted communities. Users can form groups of up to just 10 people, with whom they can instant message, share photos, send animations called "Winks", and playback (but not share) music. Users can join multiple groups, but the idea is to create more intimate fora for interaction than the usual free-for-all chat groups.

I believe strongly that technology has the potential to bring people together, and that is what people want to use it for. I'll be very interested to see the software when it comes out - if it's good I think it could do very well. The "killer apps" are increasingly social in nature. As readers of Living Networks or my blog will know, I see the famed "six degrees" of separation shrinking dramatically. The inner city area of major cities can now largely be spanned by three degrees of separation. These sorts of tools will shrink this further.