I downloaded Windows Vista Beta 2 to install on the spare 6GB hard drive in my PC in order to check it out. It won't fit. I guess Vista will have to wait until I get around to buying a bigger spare hard drive, assuming it ever gets on the PC at all (it's already iffy with my low-end 64MB GeForce4 MX 440 graphics card).
I didn't figure that part out until I'd already wiped out the Ubuntu install on that disk. But that's not a big loss, since I still have Gentoo as my main Linux install on the machine, and the Ubuntu install had completed its purpose of my testing a Linux distribution to recommend besides Gentoo. I approve of Ubuntu, and the network manager in Dapper Drake looks like the next best thing to Mac OS X I've seen yet.