Just to round out a week in which multitasking unexpectedly emerged as a recurrent issue, a further thought inspired by a piece in the New York Review of Books. Charles Petersen discusses two recent books on Facebook and MySpace. Both recount the histories of the social networking sites and the review focuses on the class-based origins of Facebook at Harvard and the more working-class ethos of MySpace. It's an appropriate approach to social networking and one that Petersen develops with insight. More implicitly, the review underscores the importance of capturing and analyzing the history of digital communities and social interaction, which for many seem utterly ephemeral. It's sobering to realize that the establishment of both MySpace and Facebook (or at least Mark Zuckerberg's initial attempt, Facemash) occurred only in 2003.