I am getting research on networking and multimedia sites like YouTube and Myspace, and I need information. I (1)need the names of other sites like that, (2)problems with those sites (examples: security, content, advertising, threat to the user, legal issues), and (3) the value of these sites (examples: meet new people, information sharing, broaden your exposure as a: photographer, filmmaker, writer, musician), free (mostly) and easy to use (kind of). All answers are appriciated.

There are a few, bebo, Facebook, hi 5 myspace, faceparty too to name a few. These aim such as Facebook to keep college people in touch when they leave for university or move away. Bebo is a way for people to make friends through friends and branch out to people around you. These are a problem though if people give out personal details too easily e.g contact info. They also are bad if exes and other people may try to stalk you. But you may remain unaware.