I downloaded and installed Vista RC1 on my desktop machine at home during the weekend. It still didn't have the network drivers for the old old card in their. I'd forgotten what card was in their, and was in no mood to open up the box. I downloaded kubuntu, and booted of the CD with the intention of checking what card I had so I could Google for Vista drivers. By the time Kubuntu booted up from CD, I was bored, blew of Vista RC1, and installed Kubuntu instead. Which Rocks!
I figured I could always install Vista on the d620, but I haven't had the time yet.