Pocket Hack Master is an advanced utility that allows you to alter (overclock or underclock) the speed of your XScale CPU. Hack Master supprts speeds from 60 MHz to 472 MHz. Lowering the speed of your XScale CPU will add to your battery life. Or you can increase the speed if you need more power. Get detailed information on your device, system processes, threads, modules, system databases, battery and power
Apparently the 'trial' software does not adjust the speed, only shows the system information. But at US$ 9.99 a 50% speed up on certain devices would be cool.