We need a list of the 20 largest social networks on which it is possible to display a custom widget - ie those in which one can embed html code and have a widget appear.
FabeBook, MySpace and Ning, for example allow this, but Bebo only allows embedding of widgets if they are "partners" of Bebo so Bebo is not a contender.
The list must contain:
1. The url of the social site
2. The number of members or hits/visits per day
3. The size in pixels of the area in which the widget can be displayed
Please do not include FaceBook, Ning, MySpace or Spruz as we already have the details for those