Sure, it won't help you love your pokey PC or Mac any more (though Apple's doing its own work on this problem with its misnomered "instant on" feature on the MacBook Air, which wakes the computer from hibernation in a few seconds), but it's a nice glimpse of what's to come.
ENGADGET: Lineo's Warp 2 boots to Fedora on Atom in 4 seconds, MPC Data's SwiftBoot warms up embedded Linux in an instant