Chromium OS is an open-source project that aims to build an operating system
Three screenshots of the latest released Chrome-OS
Google OS App Basic – Google OS App Menu – Google-OS-App-Panels
Images I’ve found via Reddit Chromium OS open source project released
more links and informations via The Chromium Projects – Chromium-OS
Update for the latest Google-Chromium-OS reads
Google Chrome OS will not support hard-disk drives via Computerworld
“Google says SSDs will lead to a fast boot time”
Google’s Chrome OS revealed — with video! via Engadget