This just in: there will (as predicted) be a Kindle app for the iPad. Barnes & Noble is also announcing an iPad app.
Why does this matter? It means that the iPad is effectively the universal e-reader, capable of pulling in purchases from all the major bookstores, as well as Apple’s and public domain party/PDF publications. For myself, I’m planning on grabbing one so I don’t need to haul around hundreds of pages of constantly changing interface specs at meetings.
(That and, err… maybe my comic book listings…)