It's the online business equivalent of jeans that don't make your butt look big. Social media ROI is everyone's holy grail of the moment. And it's easy to see why. If a business is going to put the time, effort, and attention into social media marketing , it would be nice to think we'd actually get some sales out of it. In other words, we want a return on our investment. Sonia Simone talked recently with Sean Jackson, Copyblogger Media's CFO,