I read this editorial at Gizmodo that was pretty interesting. It said, if you’re not on facebook, you’re an idiot and you’re getting left behind.
So get on facebook.
The most persuasive bit:
Facebook is the most important way we touch our friends online, period. Birthdays, parties, Passover seders, graduations—they’re all organized on Facebook. Wedding photos, baby photos, stupid college parties photos you’re nostalgic about already—they’re all on Facebook. Everyone you might still care about in your life, despite distance, work, stress, money, and time—they’re (mostly) all on Facebook. And all there to grasp, with the most minimal of effort. Really. Just click a bunch. If you care about any of these things—socializing, memories, friendships—you should be using Facebook, in spite of all its sour, vexing flaws.