Phoenix Technologies has signed a deal with ASUS to include their HyperSpace "instant on" OS on new ASUS laptops, including Eee PC's.
Hyperspace is a stripped down Linux OS that provides you access to just a few frequently used applications like Firefox, or a media player, without waiting for a full fledged OS like Windows, or Linux to boot.
Brad Linder from Liliputing did get a chance to try it on a Lenovo IdeaPad S10, "it’s not exactly an instant on environment for netbooks." Brad stated "it took more than 10 seconds to boot HyperSpace. Still, I suppose that’s faster than the 40+ seconds it typically takes to boot Windows XP.", according to Brad.
There are 2 versions of HyperSpace: HyperSpace Hybrid & HyperSpace Dual.
Runs on Intel VT-enabled CPU's (Core Duo, Core 2 Duo or higher), which can found in more powerful laptops, that allows you to boot Windows in the background while HyperSpace loads.
Runs on Intel Atom, or Celeron M CPU's like found in netbooks & only lets you boot into one OS at a time.