MoodleTouch.com recently posted an update about their plans to develop and release an iPad specific app for Moodle:
It has become apparent that Moodle 2 has some time to get stable and ready for production and we suppose that at least during 2010-2011 people will keep using Moodle 1.9.
So we decided to publish special iPad version of mTouch and we are working hard on that version. We hope to publish iPad version of mTouch by the end of September 2010. mTouch for iPad will support same feature set as the iPhone/iPod Touch version with an optimized iPad layout. [link]
Shown is the Creatif Theme for Moodle 2.0 mocked up on an iPad (http://goo.gl/PT8R).