I had a conversation in my comments with Eric Hammersley a while back about the difference between VMWare and Virtual PC, and which would be a better choice. I'm using Virtual PC, but I have a license for VMWare. I've put off trying VMWare mainly for two reasons. First, I don't want to spend the time to create a new VMWare image. It took me a while to get my base image set up the way I want it, and I still tweak it every now and then. The second reason is that I've been using the images, which mean I have three or four images with a bunch of files in them. It would be a pain to port all that over.
Well, shortly after the comments, Eric has this post about an import tool that will take a Virtual PC image and create a VMWare image out of it. Nice. Now I can give VMWare a try without putting in the time to build a fresh one, and I don't have to lose my current image set ups if I were to move that way.