Nielsen recently published it regular review of what is going on in Social Media land the highlights of which were the 2,500% rise in Twitter and the fact that FB has now overtaken MySpace as the most visited Social Network.(69m montly visitors for FB v 56m for MS) There was also one other very interesting fact - Ning which according to Mashable recently announced that more than one million social networks including Twitter Moms group with upwards of 13,000 members, the This is 50 fully branded social hub for 50 Cent’s 400,000 adoring fans, and Ning’s MuggleSpace, where 15,000 plus Harry Potter fans gather together - is now the 2nd fastest growing social networking site with traffic up 283 percent YOY.