Adobe Proto - Wire framing on a tablet device
You may have already seen this but Adobe Proto is an interactive Wire Framing tool that allows you to create wireframes on a tablet device then test it out (Android only though ATM). Great if your project is tablet specific or has a large part of it centered around tablets. But it looks a little awkward to use in some cases and its not out yet for iphone/ipad. That said I would still like to try it out...

