Supposedely you can overclock the ARM on an IPAQ. See an excerpt below...
http://www.cewindows.net/reviews/rov.../roverpcp6.htm
We installed JS iPAQClk and it works! I was capable overclock processor speed with JS iPAQclk utility! I think that the device should work continuously for 6 to 8 hours being used in standard operation mode. The cradle can be connected to PC both to USB and to COM port (with optional cable).
Also found some more information on overclocking the IPAQ ARM Processor at
http://www.overclockersclub.com/reviews/ipaq.php.
And finally, a quasi link to the program...
http://www.davespda.com/resources/faq/general.htm
The program is freeware and there is a HUGE disclaimer that tells you you could be hosing your device, so reed and heed!!!
http://www.jimmysoftware.com/softwar...k/download.asp