Happy Birthday Facebook! What About Those Happy Returns?

Facebook, the social network, birthday reminder, party inviter, video uploader, super poker, and general life updater is celebrating its 5th birthday. Co-founded by three Harvard friends in 2004, the worldwide network boasts 150 million users, dwarfing News Corp.-owned MySpace. But Silicon Valley is beginning to poke back, wondering when Facebook will grow up. “They need to grow out of their childhood really fast,” says Rob Enderle of the Enderle Group. “They have to grow into adulthood and adulthood means paying the bills.”