ChromiumOS is a lightweight, lightning-fast operating system for your netbook, laptop or even desktop. With the familiar environment of Chromium/Chrome, the entire web is at your fingertips in seconds. HTML5 & Flash are fully supported, allowing you to enjoy the very best that the web has to offer.
Flow is the latest in the line of Hexxeh's hugely popular ChromiumOS builds. Flow is the most exciting version yet, bringing even more hardware support, an auto-updater, webcam support and an improved application menu & directory. All this, requires only a 2GB USB drive (download size is 327MB).
Download and install instruction can be found here.