IPad's Early Adopters Are Gazing at the Ads -- for Now Pointroll Says Target, Ford, Marriott, Unilever Seeing High Engagement Rates After Four Weeks on Platform NEW YORK (AdAge.com) -- It's early days for advertising on Apple's iPad, but advertisers running campaigns on the device over the last four weeks say people are watching -- and a lot more than your typical rich-media web ad. A Pointroll iP