Social networks and analyzing their audiences

OK, let me put social networks into some kind of perspective so those that have a life beyond the Web can appreciate the concept: So you’re having a baby. I understand, having five children myself, that women get together for a baby shower and talk about baby stuff. That stuff might include some of the experienced mothers sharing the joys of an early epidural or the sense of victory they have when scoring a great sale at Baby Gap. It could also be the expectant mother asking about C-sections or the complications of having twins. (Tell me about it: I almost fainted when I heard we were getting two for the price of, well, eh…two.) Now those s...