Jolicloud transforms  netbook into a sophisticated web device that taps into the cloud to expand your computing possibilities, according to the Jolicloud developers.

Basicly Jolicloud is a customized version of Ubuntu Linux that combines desktop
& web apps. It allows you to install web apps alongside desktop applications.

Here's a quote from the Jolicloud site:

The online world is taking processing power away from our computers, so we won't need expensive machines in the future. The web improves itself, so we don't need to replace machines all the time to be able to run newer versions of operating systems or office suites.

But the real catalyst of change has been the arrival of the netbooks: they started as an experimental low cost laptop for kids and they now radically change our views on how much we are willing to pay for personal computers. Think about it: computers are now becoming cheaper than mobile phones and MP3 players.

We feel privileged to witness this rebirth of the computer culture and are very excited about the world changes it can foster: More affordable means more people around the world connecting with knowledge, more communication between people and more balanced access to computing power with less cost, format or geographical limitations.

We come from the web, so we built our user interface mostly using its core technologies (HTML, JavaScript, CSS). We have integrated our web DNA into the OS to make it modular, social and personal. Our developer platform relies on the web and will let anyone or any service join in no time. With our API, developers will have the ability to let their website communicate with the computer directly with no need to code specific native applications.