If there is anything that is a must have for the Droid, it's this forum. What valuable information I have found here, such as the one posted by mrschmitz. Thank you!
MICP 1480
also, when it's in the car dock, if that's where you're using it for navigation, the magnetized bits in the dock seem to keep it awake.
There's also a widget called "Screen Mode Widget" that creates a widget on your screen that allows you to easily choose 3 modes:
1) Sleep Auto: Device functions as normal
2) Awake Stay: Device won't lock but screen will turn off
3) Screen Stay: Device won't lock and screen will stay on
I haven't used it very long but so far it has worked just fine.