"It was just the finger-style thing - I just thought I fancy doing something in that style, " he added.

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The overall rate of heart attacks and cardiac deaths was low to begin with and was not significantly changed by doing the fancy artery imaging.

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It's also unclear why RIM bothered using fancy piezoelectric switches rather than simple mechanical ones, because they're not doing anything with the technology other than letting you click -- when you turn off the phone, the switches "harden" and prevent you from pressing the screen, but there's no option to keep that effect going when the device is on.

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Nearly two-thirds of people browsing Revel Touch apps are doing so between 5 p.m. and midnight, and half are lingering on the fancy touch features that let you match tops and bottoms with the swipe of a finger.

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