Interconnected

I came across this facebook application, friend wheel, thanks to ben askew. It links all your friends together by who they know. Ben's wheel was very well interconnected suggesting a lot of people he knows all know each other. My wheel is quite different and suggests a number of disparate 'communities' which i belong to. I'm quite interested in what communities mean these days and which communities we belong to. This wheel shows church friends, people from the youth group i used to help lead, uni friends, highway projects, music friends etc. There are also quite a few people i know that none of my friends know, does that mean i am on the periphery of their communities (or just cos other people from that group of friends just aren't on facebook yet). It's interesting, a geographical one would be interesting too. Geographical communites eh? That's so twentieth centuary.