It would be wonderful if Apple makes it available to read your books off your computer like Amazon and BN have for the PC right away. If they do, that can sell a lot of books ahead of time. I don't think it would hurt ipad sales because I read plenty of books on my Mac right now and I don't think the sale of books is what Apple is after but the sale of the device. Plus it would give people a chance to see how it is set up instead of having us crowd each other in the stores testing on April 3rd.