In a new report discussing Apple’s rollout of its iAd mobile advertising service, Advertising Age suggests that iOS 4 for iPad will arrive in November. According to the report, Apple is telling marketers that the iPad—which will require an iOS 4 update to run the ads, and is being looked at as the most promising device for advertisers—won’t be on the iAd platform until November. In addition, the report claims that many of the…