Since the iPad can use existing iPhone apps, and other e-readers and dedicated eBook apps abound in the App Store, there will definitely be ways to buy books fr

Since the iPad can use existing iPhone apps, and other e-readers and dedicated eBook apps abound in the App Store, there will definitely be ways to buy books from other sources, or load unrestricted RTFs/PDFs/etc. I wouldn't put it past Apple to specifically block them, but I don't think they will.