Back in 2006 hrmpf revealed a patent filed by Apple detailing a bezel control system; essentially integrating touch sensitive bezels into its iOS-based products to allow for dynamic button assignments within Apps.
Well here’s a thought…
<conspiracy> What if the now fabled iPhone 4 death grip is just a poorly hidden implementation of a cool new bezel control system?
That lower left-hand corner certainly seems very sensitive to touch!
</conspiracy>