ReactOs - A free Microsoft Windows® XP compatible operating system.

[More Booze]

Check this out. It isn't 100% complete yet but I think it looks very interesting.

The ReactOS® project is dedicated to making Free Software available to everyone by providing a ground-up implementation of a Microsoft Windows® XP compatible operating system. ReactOS aims to achieve complete binary compatibility with both applications and device drivers meant for NT and XP operating systems, by using a similar architecture and providing a complete and equivalent public interface.

http://www.reactos.org/

[woj]

Don't feel like reading it, but it's probably another linux distribution with wine preinstalled?

[StuartD]

Great if you don't need sound with your games from 1984:
http://www.reactos.org/media/screens...ott-r19963.jpg

[woj]

Great if you don't need sound with your games from 1984:
http://www.reactos.org/media/screens...ott-r19963.jpg

or if you are still using photoshop 3.0:
http://www.reactos.org/media/screens...photoshop3.png

[Manowar]

Sweeeeeeeeeeeet

[u-Bob]

"Please bear in mind that ReactOS is still in alpha stage and is not recommended for everyday use."
The thing's been in alpha stage for over 5 years now...

[Radiate]

Don't know what the lifespan will be, Vista should be here for consumers at the beginning of 2007.