You can download the official builds from here:
http://www.chromium.org/getting-involved/download-chromium
Official developer guide:
http://www.chromium.org/chromium-os/developer-guide
For more information and how to install, please refer to hexxeh's site:
http://chromeos.hexxeh.net
username: chronos
password: chronos
FAQ
Q: How can i burn live DVD in Ubuntu by your archive?
A: sudo dd if=chromiumos_image.bin of=/dev/sdX bs=4M
Q: How to become root?
A: See http...