Thanks to hexxah if you want to play with Google's Chrome OS, there is a build available to download which can b put on a USB stick and booted. I was sceptical when Google announced they were to take on Microsoft with an OS, and some said I was wrong. Having installed and run it, I stand uncorrected (currently at least).
It won't be an OS for me I think, but I can see some people, who just want everything in a browser and do everything online, it might be functional. Does boot fast though.