Is this possible
How to Install Ubuntu on Your Nexus One/Android! | Nexus One Hacks Blog
Taken from article above.
For example, most new Android smartphones including Nexus One, HTC Evo 4G, and Droid X all use ARM architecture CPU, meaning you can only use ARM-based linux systems/ports.
So it is to my understanding the droid 2 uses the ARM cpu. Will we be able to have ubuntu running on our droid 2 or would the encrypted boot loader stop us dead in our tracks. Well I am sure someone will figure out a way to dual boot ubuntu on a droid 2. I hope that will be soon if its not already possible.