I have just joined SocialSpark.com. I am still floundering around in the learning process but one thing that I have managed to grasp is that friends and networking are very important.
In order to build a network, I have looked at the sparks and checked out some fellow bloggers sites like Alex Barger's. I think that using this form of networking is really innovative.
What intrigued me about Alex's blog was that he is doing it for charity and his concept of virtual volunteering. Take the above link and read about his cool concept.
I will have to investigate that concept myself.