“[Danah Boyd’s] essay notes the origins of and differences between MySpace and Facebook and the users they attract. The main dividing line?  Socio-economic class. According to Boyd, MySpace tends to attract what she calls the “subaltern” while Facebook draws the ‘hememonic.’ Or, to put it in blunt Mean Girls clique-speak, Facebook is the domain of choice for college-bound jocks, preps, and queen bees, MySpace the one for immigrants, alternakids, and wannabes. Facebook is more like Target; MySpace, more like Wal-Mart.”

and here’s the article