Off the top of my head:<p>Something for writers along <a href="http://www.hogbaysoftware.com/products/writeroom" rel="nofollow">http://www.hogbaysoftware.com/products/writeroom</a> lines.<p>Portable blogging.<p>Trip planning - going on a family holiday? Store your tickets, where you're going, what's good to see there, the photos you've taken (once apple add a camera), get recommendations on things to do, alerts about like minded holidaymakers to spend time with, reminders to get appropriate jabs...
Posted seeing as the other RFS discussion seems to be more about the meaning of the iPad and whether it's a good idea. Hoping we can get a more focused discussion on how to extract cash.