Will the wonders that developers are able to accomplish ever cease?!? I certainly intend that it never does. Apparently, some ingenious folks were able to shoe-horn Jelly Bean onto the original Motorola Droid. Obviously, there are still several bugs and it will need a ton of testing, but this is pretty amazing. It's like cramming Windows 7 onto a 486 DX2-66, or like shoving the engine from a Nissan GTR into a Model-T Ford, or like putting miracle whip on a mud-pie...

Okay, that last one made no sense at all, but you get the idea.

Source: XDA