What blippy does: it shows all purchases you made with your credit card, where you bought, how much you spent, etc. - applying the rules of social networking and sharing. This financial transparency can not only be used to socialize, but for much more, i.e. donation transparency and also administration (no more expense reports!)
No one knows where the world is heading with this, but this is the direction. Maybe twitter isn't so five minutes ago, maybe it's just the beginning... ?