I am currently doing some research for an analyst report at work, and I thought I might update my November findings of how many Facebook users there are.
The total is within the ballpark figures of total users (Mix08 panel indicates around 65million from memory) so listing seems fairly complete, with maybe less than million missing for small countries not listed.
I found some of the results impressive, especially given the user growth in less than four months- even in countries like the US and Australia which I’d thought would be peaking. Sweden appears to have a bit of Facebook fatigue with canceled accounts, and looks like fundamentalist Saudia Arabia has a bigger userbase then tech-savvy Russians showing.