Vista on a MacBook core duo (Rev A) with 2GHz/2GB is a dream. I've been running on this machine for the past 6 months and have had good luck. (I'm one of the devs on vista if anyone is wondering.) And now I can finally post this. Here's what works and what doesn't:
1) Graphics: there is a wddm driver for the GMA 950. That means that if you have more than 512MB of RAM you get glass. It's in the Vista Box. The brightness control causes issues with UAC. It will ask for permission to launch whenever you log in.
2) Sound: The sigmatel driver included in the Vista Box works, but it takes a small registry hack. A key has to be added. Alternately if you unpack apples drivers the sigmatel driver in apple's drivers works without the hack.
3) Networking: Both wired and wireless in box.
4) Trackpad: the default trackpad driver for Vista works, but you don't get any advanced features (ie. no two finger click). You can install the apple trackpad driver and get the same functionality as in XP. There's a catch. The driver doesn't come out of sleep properly. Apple knows about this. I've been using a program called AutoHotkey in the interim.
5) Keyboard: apple keyboard support works great. No problems.
6) Bluetooth: getting this working is a bit of a trick, but it does work. Both my mighty mouse and my Motorola E815 work in Vista with apple's bluetooth support. It must be installed manually through device manager.
Hope this helps everyone. I'll be keeping an eye on mac support from the inside ;-). I am proud of Vista and it's a solid OS. The first windows OS I can work on. It's well worth dual booting. On the note of hardware, Apple still has it down. The Mac is the best Windows machine to date
. Thanks. Post here and I'll try to keep checking back.