Hmm.. the update.zip won't be available for users who did the same with 2.1?
and I type this from my Droid.
Well, with the exception of Froyo the only way to root was to go back to 2.0.1 first. You could jump from 2.1 to the leaked rooted Froyo, but I'm not certain that if you download 2.2 from Verizon that you will be able to root. They would have to root that first.