Revision 3 has launched a new webshow all about social networking.
http://revision3.com/socialbrew/
They take a look at the most popular sites with a tweak toward what's trendy and tips and tricks for handling each site. In the first episode they actual quote statistics on what happens when you add more widgets and plugins to your MySpace pages, etc.
Overall, it's a bit too cutesy for my taste but it does have some great info especially for anyone in the Older Generation who is trying to market to the the younger generation.