Big, bigger, biggest?

I was wondering: what is the biggest online community in the world, let's say defined as having the largest number of registered users on a given day in a year? Big Boards gives some insight, but having read an article about Bebo, the numbers given by Big Boards are dwindled by the membership numbers of these social networking places: Bebo should have around 22 million registered users, MyPlaces.com is said to have 50 million user names on record. South Koreans flock together in CyWorld in their millions. Couldn't find a definite answer though. Another question would be: who has the largest number of person data on (electronic?) record? The Chinese post office?

Any 'official' rankings out there?

Categories: km, communities