You've probably heard about PCs that can start almost immediately, booting into a Linux OS so you can check e-mail or play some music
.(HP Voodoo Envy133 and the Lenovo IdeaPad S10e for example)
But so far, those systems have been embedded in a PC's BIOS, meaning that if your PC didn't ship with the capability then you were shit out of luck.
Presto is a similar instant-on system that you can install on an existing laptop or desktop(support for xp of vista).
the public beta goes up tomorrow (March 16, 2009.)