LinkedIn Labs have launched InMaps which helps you visualise your social graph associated with your profile. It also allows you to explore which of your contacts are connected together. Here is one I created earlier which looks like technicolour candyfloss.
renaissance chambara | Ged Carroll - Created by Ged and offered to surfers (or whatever folks do on the 'web now) under a BSD licence. From a technology perspective this site is powered by WordPress and supercharged with caffiene. It looks minimalist, yet aesthetically pleasing thanks to a slightly tweaked version of DePo Skinny Theme designed by the talented Mr Powazek. The site is hosted on a grid service by the clever people at (mt).