I just installed VMware fusion on my Macbook; Parallels they crept up behind you. Don’t get me wrong I love parallels and its incarnations, but VMware has a smaller feature set and its fast.
I have been running Fedora 7 through VMware, with it emulating to cores thats right you can virtulise stuff on multiple cores. It screams. I had a little trouble getting the resolutions right (this is because Fedora isn’t a supported OS) but a bit of googling (who knew this was now a verb) and I got it going.
I now have a fully operational Death Star, for use with my many future Ruby on Rails Projects. I am really looking forward to seeing what Parallels comes up with in there next version, all it really needs is more performance and I will have a dilemma which to use?