Holly and I have been working on an Expense Report application for tablets. We used a Flex 4.5 version in our session at MAX this year, but we have also been working on a 4.6 version in parallel. The new components in Flex 4.6 are really helping delivering a great experience on tablets. You can read more about Flex 4.6 here. Thanks to ESRI and Mansour for the great maps.
This is still work in progress, but you can watch a video of the application here:
Holly and I will be co-presenting at RIA Unleashed this year. We have a workshop on the 27th, and, if you attend, this is the application you will build (plus additional bonus features not demonstrated here like push notifications, etc). Since we want to keep the content fresh (and we still have to polish a few things), we will make the code available after the event.
You can read more about Flex 4.6 and the prerelease program here.