O’Reily Radar recently released a report on Facebook demographics, particularly number of users by country and growth rates.  In the last four weeks, South America and Central America / Caribbean have been the regions the adding the most Facebook accounts percentage wise.  Combined, the regions seem to have a little more than 5 million users.  The country with the highest growth was Chile, followed by Uruguay, and Argentina.

Interestingly enough, about 13.5% of Chile’s online population has a profile on Facebook.  Keep in mind that Facebook recently translated their platform into Spanish and other languages.  I wonder what will happen once Facebook offers Portuguese as a language? Will it dethrown Orkut?