no, i have been using windows xp for some time now though. After using it for several years, i have even been considering going back to windows 98. So i certainly wouldn't be interested in windows vista.
I suppose i should be using Linux!
I'm still using Win2k. No need to move up to XP or Vista for me. I have Linux running on the other computers I own. I decided to move to Linux a few years ago and just did it. I started with the distro DSL, then Knoppix, now I am running Debian(Sarge). Installing the newest Flash was simple. I have yet to use Wine, but it keeps getting better all the time also.
Vista feels like the next ME, it feels like it will have a short lifespan before the next MS OS is out.
I feel that Windows is good for some. Linux is good for some. Mac is good for some. If only more programmers would get on the OpenGL bandwagon and start coding games in that, we could see what runs better for different games. Yes DX is easier to code for, but OpenGL can run with it.
For someone looking to disable the autoplay feature in XP, I believe that installing Daemon Tools will disable it for good when you first install it. Be aware that some games treat Daemon Tools as cheat software and some games will not run with it installed. GC2 works fine.