Have you looked at your LinkedIn map? If not, you should, here’s mine:
Totally stunning how groups of interconnected people tend to be close to each other: for example look at the yellow IBM cluster on the right hand side, sandwiched between the Lotus Italy group (light blue) and the un-labeled Lotus Worldwide group (in grey). Or the Ketchum group close to the Pleon one and the Brodeur folks just above those.
Or how the PR clusters (clients, journalists, competitors) are intermixed.
Very well done, get yours here.