Can I download wallpapers for the NEXUS One and use them on my DROID and if so how ?
No, well you could, but currently they won't move so. . .you need to wait for the 2.1 update that will be pushed to your phone in the next couple weeks or so then you will be able to use animated wallpapers.
Verizon WirelessMoto DroidBugless Beast V0.8