The interesting diagram included below is a visualization of my LinkedIn network.  It represents the 1,220 contacts I have connected to via LinkedIn, since I joined as the 8,638th member of LinkedIn way back in 2003 or 2004.

The blue cluster in the upper right contains primarily contacts from the Arizona business community.   The small cluster in the lower right corner contains contacts from Eyring Research Institute, the company where I spend the first dozen years of my career.  The big, multi-colored cluster to the left grew from my interaction with Sun Identity Management and Telecommunications groups, with many people transitioning with me to Oracle or other companies, plus folks I have added since the Sun Acquisition.

You can get your own map at InMaps, from LinkedIn Labs.