Is there an adjustable screen dimmer for Elfin

[Paul_Days]

I am searching for something that can dim the screen, not like the factory setting that turns off the screen after... 30 seconds. Just something so if i am searching for something, like 10 seconds later it'll dim to like 10%, then anything i do brings it back to where it was.

I used to have this hack in my Treo 750 and it really expanded my battery life like crazy.