We recently told you about download Google Chrome OS for VMware from GDGT.com. In addition to that you can also download Google Chrome OS through torrents. The Chrome OS image from torrents can be run using Virtual Box from Sun.
Once you have downloaded the torrent you can read this step by step tutorial by TechCrunch to install Chrome OS in Virtual Box.
The default login to Chrome OS is your Google username and password. For more screenshots of the Chrome OS build, visit the Chrome OS for VMware post.