Anyone rushing to save their Friendster data? Anyone who just can’t live without those photos, that conversation, the witty description of your hobbies or list of favourite books.No? Nobody? Didn’t think so. What seemed so valuable, so important at the time just seems so unimportant now. Maybe that’s a way to help value social networks… a time lagged effect on everything everybody puts up there. A photo now is worth a cent, in a month it’s half that, in a year a tenth… Tally everything up, and a social network is worth more if there’s more up-to-date activity on there. Anyway, the Friendster news reminds us that the most valuable thing a social network can have is short-term relevance for people.