Gizmodo is almost prescient in their timing of posting this piece on setcpu. As I learn more and start to fill in the blanks of my knowledge, I'm gathering details from different places. Giz always does a good job of making tech available to those of use who don't have programmer cred.
Enjoy:
SetCPU Overclocks (or Underclocks) Your Rooted Android Phone
Enjoy:
SetCPU Overclocks (or Underclocks) Your Rooted Android Phone