Just from my initial eyeballing of the teardown of the new Droid 2, parts are defiantly looking interchangeable with the original Droid.
The keyboard and front bezel are the 2 major reworks, I do believe that the droid 2 has a blue color instead of black (personally if I performed this mod, I would be sandblasting the bezel and polishing it to a chrome finish, I have seen a few others doing this and it looks amazing).
I am looking for either closer pictures of the droid 2's bezel - keyboard - digitizer - and flex cable, any schematics of the droid 2, or someone brave enough with enough money to find out for the rest of us and take the initial step.
The droid 2 from this point looks like a incremental update and I have a funny feeling that outside of the locked bootloader and cpu bump to 1ghz (mine runs quite stable with a ULV kernel @ 1.25ghz as is) that 95% of the parts are reused.
Parts should be available for the droid 2 soon.