Eventually there will be a site again. So long use one of these links to get connected...
LastFM (Long time not used, but since I connected with my Spotify account I am scrobbling again)
Delicious (I rediscovered that it is still active, so I am planning to use the site as bookmarking service again)
Instagram (Just because my wife likes to tag me sometimes)
I used to be in some other social networks (mostly from Germany, like Xing, but also Orkut or Pinterest), but cancelled any remaining memberships (I guess) as I don't like a lot of duplication (especially in case of profile updates) or simply because the network didn't give value to me anymore or it has been shut down.