After creating my first iBook (ePub) and releasing it for the iPad, I got lots of questions from people that wanted to do publications that were more graphically rich, containing interactivity and video. While ePub can support these things, it's not really geared towards a "layout rich" type document. So here's an example of the opposite end of the spectrum. Wired has just released their highly interactive Magazine with exclusive content as an App for the iPad. This App was created using Adobe InDesign CS5 and other Adobe technologies. Here's a Blog Post detailing the creation of this App and here's a video (in Flash) produced by Wired to show off the Magazine:
The App is $4.99 for the June issue and you can grab it here from the App Store.