Thanks to an SEC filing, another detail emerged today about Google’s acquisition of mobile ad network AdMob. We already knew the $750 million Google-AdMob acquisition was a cash and stock deal but we didn’t know the breakdown between the two.

The latest developments in iAds, announced during the Apple Worldwide Developer's Conference earlier this week, included an updated ad policy that might just ban any iAds competitor. The wording is opaque, but it specifically states that only "independent" ad companies are allowed to advertise on iOS alongside iAds.

The war of words between Google and Apple over mobile ads sharpened on Wednesday. AdMob, the mobile advertising start-up that Google recently acquired, said Apple’s new terms of service for the iPhone 4 and iPad, if enforced, would prevent it from putting ads inside mobile apps. That could be crippling for AdMob, which is the No. 1 seller of ads in iPhone apps. Omar Hamoui, the chief executive of AdMob, said the policy could hurt developers too.