Hubris from Facebook, not again!
Sort of a false indirect claim to having 500 million users!
To put this into perspective here is the main comment by TechCrunch:
It’s kind of silly if the marketing for a movie makes the number “official” before Facebook itself does. The movie poster even points people to the URL 500millionfriends.com (which redirects to thesocialnetwork-movie.com — the official site). Still the film’s marketers are likely just playing the odds — the movie is slated to be released October 1, 2010 in the U.S., and Facebook will undoubtedly be far past the 500 million users mark at that point (and maybe even closer to 600 million users).