Not stable just yet
When the Raspberry Pi computer surfaced the tiny little machine was exactly what many HTPC fans were looking for in a budget machine. The machine didn't have much in the way of hardware on the performance side of things, but the $35 price tag made up for a lot of that. The board was made to run Linux for operating system and supported full HD video and Blu-ray playback.
However, an enterprising Chromium OS hacker going by Hexxeh has been at work getting Chromium OS to work on the Pi. Apparently, the OS will boot right now, but it's far from stable. The best news is that the project has received approval from the official Chromium OS team so hopefully a stable version will be coming soon.