Go back to 2.0?

[roflcopter]

For the sake of curiosity, is it possible to revert your Motorola Droid back to 2.0? I know that we will be able to reflash our phones to 2.0.1 from 2.1 using RSD Lite but what happens if for some reason you wanted to go all the way back to the good old days of using a circular motion to unlock your screen?

I haven't seen any way to do this, but the original firmware files have to exist out there somewhere right?