Just as an FYI for anyone thinking about Vista on this board - seems to work very well. There are a couple of caveats...
The Vista install DVD didn't have drivers for the SATA ports, but putting the driver on a USB flash drive during the install took care of the problem.
Not sure how the built-in sound works (turned off in BIOS), but I've got an Audigy 2 ZS card which works fine. I've read the nVidia SoundStorm chip isn't supported.
Haven't tried the on-board 10/100 ethernet ports since I use a gigabit card anyway (US Robotics, which works fine after downloading the driver).
I have the on-board game, serial and parallel ports turned off in the BIOS (since I don't use 'em anyway), so I don't know if they work or not.
Other than those couple of limitations, everything else works great.
On-board USB and Firewire work fine.
SATA and IDE drives work fine (SATA requires driver).
I've got 1.5GB installed on the motherboard, and all is recognized (3x512MB).
Also have 1GB of ReadyBoost flash RAM on one of the USB ports.
My A7N8X Deluxe system is running a Barton 3200+ processor at stock speed, a 320GB SATA HD, a Pioneer DVR-107 optical, and a 256MB AGP nVidia 6800GT video card. Vista Home Premium runs just fine. The user interface is responsive and even Office 2007 runs just great.
Windows Expereince Index score is 3.7. The processor's score is what brings it down to 3.7, every other index is high 4's or low 5's.
Anyway, while not an overclocked Core 2 Quad processor with SLI 8800GTX cards, for general computing it runs perfectly well.