XA.net’s CEO Rob Leathern has taken Facebook’s most recent user numbers and extrapolated growth rates for the top countries, based on published populations. Take  a look at Facebook growth ‘by the numbers’: http://bit.ly/facebook500mm

Icelanders 20% More Facebook’ed than Americans This month, we continue to follow the growth of Facebook and the countries with the highest percentage of their population with accounts. According to XA.net’s analysis of Facebook’s figures, the social interaction hub has grown its worldwide audience to 465.6 million people (as of June 1st), growing 42% since [...]

Men are starting to use Facebook more, catching up in the demographic race with more active female users. Facebook has seen its self-reported user figures rocket up by around 22 percent in the last 146 days (10/29/2009 to 3/24/2010 were the days we examined). Men increased their numbers by roughly the same amount as women [...]