How do I restore my rooted Motorola Droid back to completely stock and unrooted? I'm thinking about unrooting and going back to completely stock, vanilla Android on my Droid.

How can I do this?
This website has a very good answer:
http://www.droidforums.net/forum/droid-hacks/13466-how-back-stock-no-su-no-busybox-etc.html

Seems to cover all your bases.

Essentially involves:


flashing the stock recovery and boot images to replace custom ones
then either 


manually removing all the "root" bits, or 
(option B in the post) flashing the official update.zip putting your phone back to stock!



Good luck :)