My list was only the ones I belong to, with links to my profiles.
The point wasn't to make a list of what social sites exist. It was to share your profiles and have dc friends on other sites besides dc.
If you belong to any of the sites I listed that I am a member of, look me up, provide the links to your profiles so others can do the same with you, and provide ones for sites that I am not a member of.
Even list your myspace or livejournal if you have one. Just because I don't have an account on the site doesn't mean that you can't have other dc friends there.