Fascinating bit of futurology at Crunchnotes yesterday, with a video pointing out such nuggets as "if MySpace were a country it would be the 11th largest in the world (in between Japan and Mexico)."
There's something about web services that seems to impel Americans to compare their userbases to the population of Mexico. Back in the day, Microsoft's Yusuf Mehdi told us that Hotmail's domination of the webmail market made it (the equivalent of) the 9th largest country on earth, just ahead of Mexico. And both estimates make the same error - the registrants equals active users. MySpace, with it's maybe 40 million active users, is probably closer in population to Spain or the Sudan.