Is Everyone on Facebook?

Facebook now has 150 million users. "If Facebook were a country, it would be the eighth most populated in the world, just ahead of Japan, Russia and Nigeria."

So is there anyone left that isn't on Facebook? Farhad Manjoo of Slate says: "There is no longer any good reason to avoid Facebook. The site has crossed a threshold—it is now so widely trafficked that it's fast becoming a routine aide to social interaction, like e-mail and antiperspirant."

While Facebook etiquette is still developing, as discussed in this NYT article, it seems to be a major part of life in 2009.