Windows 7 Request

I've recently started enjoying Windows 7 at the office, and I must say I am very pleased. There is a huge difference in performance (at least running under VMWare) when compared to Vista. In fact, I'm now fairly spoiled and find working in Vista to be absolutely horrible! :-)

I was lucky enough to have someone donate a brand new copy of Windows Vista to me in July, which I've been using for WebKit hacking on the weekends. It's been a huge help, allowing me to finish up the recent -webkit-box-shadow coding and tests. Alas, now that I've been exposed to Windows 7, I'm a bit ruined! I'd love to upgrade to Windows 7, but the current upgrade options are price prohibitive ($119 for an upgrade).

I had hoped that a new Vista box purchased in July would make me eligible for some kind of low price upgrade, but apparently not.

If anyone has an inside scoop on whether there might be cheaper upgrade options, I'd love to hear them. Maybe there's a great deal I'm missing somewhere? Also, since I have a 64-bit machine I'd really like to start using Windows 7 64-bit, as that is where most new development will now be focused.

I run Vista inside a virtual machine (since I also do Mac development). I was curious if anyone has any experience with the VMWare Fusion 3 software, specifically if the performance is noticeably improved on Snow Leopard?