I use almost eveery OS under then sun. I have got 9 boxes at my place which I use as a development environment for my web development and web application writing and they each have a different platform running. I got a few Win XP Proffesional boxes, 4 Ubuntu terra-boxes, a solaris 9 box, and am in the process of getting Windows 2003 Server installed on the last box and working with IIS and Exchange Services. I have never even considered using Vista and will not use it until I feel like they have addressed all the major bugs in the system, I will be waiting until at least SP2 comes out, if not SP3