Well still very very impressed so far, only a couple of small complaints thus far, mainly the inability (as far as i can see) to change a device driver once its been installed. Removing and readding the device immediately initiates the auto device installer and for a 2003 printer we have at work it's not playing ball.
On the subject of work, i am using my windows 7 macbook at work atm and it connected straight up to the domain and is sharing all resources with no problem, its even letting me remotely control active directory on my sbs2003 server.
100% stability, its been very very good so far, and I have been thrashing both the desktop and the PC. Currently playing UT, UT2, UT3, LFS, TF2, CS, HL2, M3 Challenge and road rash and I have had no problems with any of them either.
I have got used to navigating my way around now and I can say, without doubt, I can find any file or program on my PC much MUCH faster than I can on my mac. There are so many ways of finding and organising things and they're not gimmicks either, they are genuinely helpful, like the search facility - now incredibly fast, drop down folder navigation from the address bar, dragging windows to the side or top of the screen for automatically arranging your screen, hovering over a program in the application bar to bring it to the front until you move the mouse, no window order changed and no clicks, but you can move through explorer windows and browser windows and all your running apps in no time at all.
I am definitely going to be upgrading the work machines to this when its out and has been around for a short while, possibly Jan 2010.
Anyone who wants to try it but is aprehensive, I say go for it, as long as you're confident you can back up all your files properly just in case it does go tits up. If you are not confident in backing up your files properly then just ask and I'm sure between the boffins we can help you out!