OS 2.0 - Update

The best of the companies in this list will be soon acquired by Google, Yahoo, Amazon and Ebay.

Cosmopod - Your personal desktop
Desktoptwo* - Manage your desktop in a browser
Eyeos - Virtual office operating system
Gravityzoo~*** - The Grid!
Haiku - Open source OS
Orca - Online personal desktop
Orcaa - Move your desktop to a homepage
Parakey - Web OS
Startforce - Start page with OS features
Surfulater - Collect, save & manage all your info
Webtop - Social desktop
Xin - Online OS for Ajax serverapps
Youos - OS in your browser; standard apps + develop yourself

Italic = new. Update 061224, 070119, 070303, 070517 (corrected 070527).