(sorry for the title... I chuckle every time I see "The ... Thread" titles) 
I'm waiting for my iPad (did try it at the store a few times) and I have an iPhone. One thing I hate about both is the Home button. I think it's just out of place of the "pure software in your hands" paradigm. It's stiff and just plain stupid. Do we really need it? It could be replaced with a simple gesture: touch screen with all 5 fingers and you go to Home screen. Double-click of Home button can be replaced with double tap with 5 fingers. Much simpler and faster than pushing the button that sometimes on the bottom, sometimes at right, left, or top.
I'm waiting for my iPad (did try it at the store a few times) and I have an iPhone. One thing I hate about both is the Home button. I think it's just out of place of the "pure software in your hands" paradigm. It's stiff and just plain stupid. Do we really need it? It could be replaced with a simple gesture: touch screen with all 5 fingers and you go to Home screen. Double-click of Home button can be replaced with double tap with 5 fingers. Much simpler and faster than pushing the button that sometimes on the bottom, sometimes at right, left, or top.