The source code for Android 1.0 is now available in a weighty 2.1 gig download from http://source.android.com. Anyone with the brains and manpower is now free to edit, add, modify, use and distribute Android in anyway they see fit at absolutely no cost.
This is pretty significant as it opens up all sorts of interesting possibilities for the platform and mobile computing in general. Android can now be easily ported to anything, from phones to GPS receivers, to in-car entertainment systems as well as other funky things nobody has thought of yet. It also allows companies to stop re-inventing the OS wheel and focus on building better hardware.
As long as Google can keep the project together, avoiding too many forks, everybody will win. Being open is Android’s killer feature and is why it will be remembered as a milestone in mobile computing.