Apple has released iAd Producer which makes it easy for you to design and assemble rich interactive iAd content without any programming.
iAd Producer includes:
• A single-window interface for viewing and editing ad layouts and settings
• Project templates to provide a quick start for common ad layouts
• An extensive library of page layouts, controls, and other interactive elements
• Prebuilt animations and effects
• The ability to create custom, reusable elements for use in iAd advertising
• iAd simulation for Mac and iOS devices
The downloadable package contains the iAd Producer application for Mac OS, the iAd JS 1.3 Developer SDK, and iAd Tester for the iOS Simulator and iOS devices.
You can download iAd Producer from the iOS developer center