more than 7 million

Second Life
Seems we are over 7 million residents in SL. This number stat that

A Resident is a uniquely named avatar with the right to log into Second Life, trade Linden Dollars and visit the Community pages.

The Top 20 countries were (in April):
United States 29,49%
Germany 10,37%
France 7,76%
United Kingdom 6,25%
Brazil 5,86%
Italy 4,97%
Netherlands 4,03%
Japan 3,38%
Spain 3,21%
Canada 2,79%
Australia 2,59%
Belgium 1,52%
China 1,31%
Switzerland 1,14%
Denmark 1,13%
Sweden 1,02%
PORTUGAL 0,77%
Austria 0,73%
Poland 0,64%