Here’s some more:
Cyworld – Originally a Korean social networking site, now with an American version. I found this in an article at mashable.com where there is more information and some pictures. I’m not sure how ‘world-like’ Cyworld is, but figuring out what ‘world’ means in these contexts is not straightforward. Second Life is not a world in the same way that World of Warcraft is, for instance.
Habbo Hotel – Originally Hotelli Kultakala (Finnish for Hotel Goldfish), now a global chain. Here’s the Wikipedia entry.
Faketown – I only meant to find the link and instead I found myself window shopping for a Fake I.D.