LinkedIn Labs has cool projects created by LinkedIn employees
like Aid Patrol helping homeless veterans
InMaps generates a color-coded scatterplot of your network:
The blue peninsula to the right represents my Drupal network (they picked the color!) which seems pretty insular, not very connected to the rest of my "circle"
Also, I created the labels, and in some cases I could not identify why some recruiters were assigned one color or another - except for CyberCoders and strictly technical recruiters.
why yes, I do know a lot of recruiters, if anybody would like introductions!