This sort of thing is why I love Android. A n innovative modder named “bponury” from the fairy land that is XDA-Developers has posted a video of his latest creation, the Slide 2 Wake kernel. It enables a quick sleep mode via a swipe across the capacitive keys from right to left, and an easy unlock from wake via a swipe from left to right. Thus you can turn your phone on and off without ever actually touching the screen.
Note that this is a kernel, not an app; actually enabling it will require a flash via ClockworkMod or some other custom recovery. This sort of thing apparently requires more base-level modification than is possible even with a root-enabled app. An...
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Slide 2 Wake enables locking and unlocking by sliding capacitive buttons