A study of social network website users in the US has shown
a class divide between MySpace and Facebook users. Apparently Facebook has more users from wealthier homes and more academic backgrounds, while MySpace has more working-class teenagers, minorities and members of social groups ostracised by the popular kids in high school (this may include music- and fashion-related youth subcultures).
There's another story about cultural/class choice of technology on Slashdot today. A researcher has found that nearly all Democrat election sites use Linux, while two thirds of Republican sites use Windows. http://politics.slashdot.org/politics/07/06/27/1528247.shtml