All the young people are spending today in an orgy of Facebook chatting (the site’s IM feature has just been turned on globally), but what about 35-55 year-olds? Apparently they’re a bit long in the tooth for Facebook, MySpace and Bebo. At least, that’s the pitch for GetBack Media, which is a new social network aimed at that age group, with a focus on pop culture. There’s plenty of music content tied in too, with videos from Universal Music Group and Warner Music Group, and samples of 750,000 tracks thanks to a deal with All Media Guide. Interestingly, UMG is selling GetBack Media’s ad inventory, with a revenue-sharing deal.