Is there a US alternative to Second Life?

Habbo is like Second Life in Japan. From the article:

Could you conduct market research in a week and come back with the buying and spending habits, and brand preferences, of 42,000 teenagers around the world? Sulake Corporation, developer of the Habbo virtual world for teenagers, did this very thing. And they're going back in September for another data mining run. You can read the full story in CRM Daily, Mining Virtual Worlds for Market Data.