And I think that it works exactly like Aardvark did. Strange stuff. I don't think that this could be useful, since hard questions will be unanswered, and easy questions shouldn't be handled by humans either. So I guess this kind of application shouldn't be really used, and instead we would need large, compact databases, where we can store and query quality knowledge.

I thought the same thing.. Google bought them, then shut them down the next year. Citing bringing the Q&A features over to Google+.