ChromeOS - old build but runs

http://chromeos.hexxeh.net/ Actually runs on my acer netbook. wifi works, boots fast from usb pendrive.

It has Debian at the core and has apt-get.

I'd appreciate it more if the terminal more consistently opened when I pressed ctrl-alt-t (it only works sometimes) but for what it is, it's quite fast.

http://www.slitaz.org/en/ still has my vote for lightweight installs - but without yum or apt-get it's not too exciting; tazpkg get-install does work, but it feels clunky and second rate.