Download and Manually Upgrade Motorola Droid with Android OS 2.1 [Guide]
If you can't wait for the OTA upgrade to your Motorola Droid then here is an excellent guide by Android Central for manually upgrading your phone to Android 2.1 OS. Please note that this method does not require any root access so do not worry about it. This is the Official upgrade by Google and not a cooked ROM.
This guide is posted by Android Central
Download the update from any of these links. [Official Location 1 | Location 2 | Location 3] (Note to Mac users: Don't use Safari as it may try to extract the files rather than just download them.)
Rename the file to "update.zip" if it isn't already. (Note that if you're using Windows, just change the name to "update" -- without the quotes.
Put the file in the root (aka main folder) of your microSD card. (You can pull the card from the phone, or use our method here.)
With your Droid turned off, hold down the letter "x" on the keyboard and then hold down the power button. You should soon see a triangle with an exclamation point inside.
Now for the tricky part. Press the volume up button and the camera button at the same time. (This usually takes me a few tries.)
You should now be in the bootloader. Use the D-pad to choose "update from .zip file" and choose the update. Let things run their course.
Source: Android Central
Disclaimer: You cannot hold us responsible if you brick your phone, your cat eats the upgrade or your neighbor cheats on his wife during the upgrade process