One of the things that made the iPod so successful was that any one could pick it up and use it without ever reading a manual or asking anything more than where is the on button. The scroll wheel was a stroke of genius. Now it looks like the up coming iPhone is going for a somewhat different approach. Steve Jobs was interviewed at a conference called D and said
Once you actually use this magical display there's no going back. We actually think we have a better keyboard. It takes a few days of getting used to, but I bet you dinner that after a few days of using it you'll be convinced. It takes a week -- you have to learn how to trust it. When you learn how to trust it, you'll fly.Thats a bit brave since many people will pick up the iPhone in a shop, play with it for a few minutes and make a decision *not* to buy one because they cant use it and don't want to spend a week playing with it before they can txt their friends or call people easily.