I am Just sharing how i had been able to root my Motorola Droid Pro
I am using z4root application to Root Droid Pro
Just Install it from SD Card
I haven't received the update yet myself, so I'm not sure. I'd be inclined to think that it probably won't work. Maybe something like Gingerbreak will. I've seen around various forums where several Pro users have received the update, but none of them are trying to see if currently available means will root it yet.