I found Meez a few weeks ago. It's kind of cool, but very buggy.
If you like this kind of thing, eLouai has tons of stuff similar to this that will keep you busy for ages. None of it is 3D, but you can make people, houses, rooms, smileys, etc.
(and they give you bbcode for some items!)
Made with Candybar Doll Maker 3