ecently a company called http://klout.com has given us a way now to rate our relationships with others.
All businesses are looking for those people they are talking to that are influential decision makers, some call them Sneezers...people who will do the free marketing to promote your brand to their network of friends and businesses acquaintances - what is often called Viral marketing.
Now you can look into your social media graph of followers and friends and determine their clout in the marketplace
Here is a short interview of their founder and explains it allhttp://www.youtube.com/watch?v=2FB8rICLmLg