Facebook's product allowing marketers to upload email and phone lists for ad targeting on the site may be new to Facebook, but it is not a new concept at all. Known as "CRM Retargeting" it is offered by large portals such as AOL, Yahoo! and MSN. The difference that Facebook brings are much lower buy-in prices, user simplicity and mass market appeal - all of which will combine to accelerate the convergence of offline and online marketing.