You can get nightly builds of Chrome OS here.
http://chromeos.hexxeh.net/vanilla.php
and here is the background stuff to it.
http://chromeos.hexxeh.net/
A forum post on the samsung netbook site with instructions.
http://www.sammynetbook.com/forum/threads/14979-Chrome-OS-Runs-on-NC10
and it has a youtube video.
What more could you want!? Has anyone tried it yet?