Omnigraffle has been introduced exclusively for the iPad ($50) since the iPhone/touch screen is too small. Files are compatible with the Mac version of the program. Omnigraffle for iPad is very expensive especially when compared to other iPhone or even iPad apps but I can see myself using it constantly and being very creative with it using the mobile and touch attributes. Based on the Mac version I know it will be productive to use and it will be an excellent counterexample to educate those people that have been saying that the iPad is just for media consumption. The iPad Omnigraffle video gives a taste of what its capabilities are like.
