Looks like Linkedin has been busy, with their latest Linkedin Maps and Linkedin Swarm.

Linkedin Maps shows how you are well connected to the people in your network and how they connect to each other, not only that you get to identify which contacts you want to expand next. You also get to tag in colors your network contacts, whether by industry, profession, groups, etc. Accessing this is easy and free, just sign in your Linkedin account and grant access, Linkedin Maps will do the rest and later on you just need to do the tagging manually. You can also zoom in details and have a look at that little dot, displaying each people's profile, it will also show on the right side bar their full profile.

Here is a youtube video post explaining Linkedin Maps and here is how my network map layout.