There is one interesting about PIC32 by Tom Cantrell. Please check Circuit Cellar Issue 216 July 2008. The clock speek of PIC32 can be as high as 80 Mhz. The flash speed is also faster than many ARM 7 chips. Microchip will add more peripherals to compete with Cortex M3 chips on the market.
To download Circuit Cellar Issue216, Please read the following message:
Here the Circuit Cellar 216 - July 2008:http://mihd.net/klgczs1
The archive include the pdf and all July 2008 sources files downloaded from the official site.