this zimage is undervolted 925mv and overclocked to 1.113ghz with full ram,
basically saves battery and runs faster/smoother. I'm about to try it out.
(grabbed from
here)
use setcpu to set the clock speed
edit: just tried it, OC to 1.113 it works beautifully, best zimage so far IMO
edit2: you have to use the startup.txt from the post above t his one, otherwise android won't boot.