just to add my two cents. i love how the nexus looks and the processor speed, but i love my droid and would not give it up. the droid should have 2.1 within a few weeks at most. and if you visit adobe on your droid, you see it indicates flash 10.1 will be available in the first half of 2010.
so rest assured, the droid will have the same software and firmware available to the nexus. i agree that the difference between the 2 phones will be more hardware design than functionality.
i also didnt care for the physical keyboard on the droid at first but have gotten just as fast as when i had my voyager, and hardly ever use the virtual keyboard now, though i do love some swype.