Lineo is booting up FedoraLinux 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.
Red Hat, the world's largest Linux distributor, has provided an extremely compact version of its Fedora operating system, called Sugar, that uses a mere 130 megabytes of the XO's flash memory.