Jolicloud is new OS (currently in pre-alpha stage) for Netbook. You can install programs & software on this OS as oppose to Google Chrome OS. It can run Linus, AIR& Windows applications.
Jolicloud is available by invitation only. You can request your invitation at - http://my.jolicloud.com/account/invitation?next=%2Fregister
As per Jolicloud
Jolicloud is very easy to install on your netbook and it boots pretty fast. WiFi, Bluetooth and 3G modems work out of the box on a growing list of supported hardware.
Your personal homebase contains all your settings, applications and social features. Switching to another computer and setting up the same configuration has never been easier!
Supported Device – Initial List