Lineo is booting up Fedora Linux 12 on an Atom Z530 machine, and has just hit the 4.06 second mark -- compared to a 54.72 second "normal" boot time on the system.
ENGADGET: Lineo's Warp 2 boots to Fedora on Atom in 4 seconds, MPC Data's SwiftBoot warms up embedded Linux in an instant