At the Ad:Tech conference in San Francisco this week George Kliavkoff, Chief Digital Officer at NBC Universal, discussed their interest in returning to digital distribution via 3rd parties.   They didn’t name any names, but it seems clear that they were talking about Apple because they already distribute digitally and via third parties, but iTunes seems to have gained a lot of momentum. We know that initially Apple and NBC broke off their relationship over pricing issues, but apparently that’s not the only