I'm part of the first wave of dual boot (Win 7 and OSX) hackintoshers from March 2009 when the Mini 9 went on sale for $199.
Been loving this thing, it's gone w/ me to the Philippines and Canada and has performed like a charm.
I've used Win 7 mostly as an experiment and for 2 programs that only exist on Windows. I pulled my data off before the July 1 beta deadline for Win 7. Since then, I haven't fired up Win 7, mostly because I want to upgrade it only to the release version of Win 7.
I haven't followed much of the upgrade/setup threads, mostly because my OSX partition works fine.
What's the suggestion for loading up Win7 once the retail version is out and ready to buy? And yes, I will buy a retail copy to work on my Mini 9.