Try Syllable:
http://www.syllable.org/On my machine it boots up to the login screen almost instantly after it's selected in the boot menu. Has pretty good hardware support (not as good as Linux, but miles ahead of other fringe OSes) and a passable browser (slow, missing a few important features at the moment, but supports CSS and Javascript). It's also pretty simple unlike a user-friendly Linux distro that merely wraps the complexity in a simple interface.
