The key to any successful viral marketing campaign involves finding and activating innitiators. Different marketing directors call these people different things. I prefer the use of the term innitiators. Basically, these are people that have two things in common: 1) they have a lot of friends (and are usually early adopters), and 2) they have a lot of influence. The idea is to sell them on your product, and them have them peddle it to their friends. Social networking sites are great for finding initiators because many of them tell you how many friends a person has, and therefore how large their network in. In the above graph, you can see our friend network graph from our Care2 site. All those in blue are people Americans for the Arts has a direct connection with, and then all of those in purple are the friends of our friends. Our Care2 site is relatively new, so we only have around 120 friends, however because we have purposely sought out innitiators, we have over 77,000 people...