Okay so I know there are other posts on how to do this by the SPRecovery nandroid backup and the sbf from Motorola but this is a simple update.zip you place on your MicroSDHC card.
Step 1: Flash SPRecovery(does not work with ClockworkMod recovery)
Step 2: Download unroot_update.zip
Step 3: Boot into recovery by using ROM Manager from the Market or Quick Boot from the Market.
Step 3: Now in SPRecovery go to install
Step 4: Allow update.zip installation
Step 5: Install update.zip from the SD card
Step 6: It should have finished and reboot
For Stock Recovery Image:
Step 1: Reboot into recovery by Quick Boot from the Market
Step 2: Press the camera and volume up buttons until you get a menu.
Step 3: Choose to apply update.zip
Step 4: Now it should be done and you can reboot
Now to make sure your Droid is unroot open up your application tray and make sure you dont have Superuser Permissions, if you do start the process over by using the stock recovery image method.
I hope this guide helped some people out
All these pictures and the zip file are from RootYourDroid.Go check their site out. Thanks