But then there is another difficulty: making the components exactly the right size is even more crucial for a quantum-effect device than for a regular transistor.

ECONOMIST: The transistor��s heir

To find out what effect a cooling device might have on athletic performance, Dr Grahn and Dr Heller recruited a colleague who was a recreational weightlifter.

ECONOMIST: Athletics: Cool, man | The

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.

ENGADGET: BlackBerry Storm2 hands-on and impressions Hands-on