Thank you for the list! The company I work for understand the need to learn more about social marketing and are starting to compile a large list of sites to referrence so this will be a great start!

Very good advice. I think there are some many companies out there that create 100 social networking profiles becuse someone told him it would help their business. It really all starts with having a good website and good content then being very social in the networks that fit the demographic you are trying to target.