Regarding tactile feedback. I recently just re-enabled audio feedback on my Chumby (resistive screen), and the combination of physical push + audible 'click' is

Regarding tactile feedback. I recently just re-enabled audio feedback on my Chumby (resistive screen), and the combination of physical push + audible 'click' is sufficient for most of my need for feedback, and those of my 3-year-old. I also have the vibrate feedback on my Nexus One, and find that for small capacitive screens a subtle vibrate executed on the exact click-fire to be extremely useful. Neither of these will ever compare to old-school keyboard tactile response - something that laptop keyboards also fail to equal - but funnily enough I find the N1 input feedback more satisfying than a MBP keyboard. We're a long way off programatically raised areas on low-cost touch-input devices. That said, Apple have a long track record of amazing UX and must be looking into these options. I suspect the tactile vibrate experience wasn't too compelling on the scale of the iPad, but it wouldn't surprise me if this feature appeared (localised in quadrants?) in future iPad versions to afford better feedback for typing and other operations.