I recently purchased a black MacBook 2.4GHz, and I am in the process of installing Vista 64-bit on it.
To answer your question, yes, it does work on the new MacBook, but not without a little bit of massaging. The Boot Camp installer (setup.exe), if you try to run it directly, will say "Boot Camp x64 is unsupported on this computer model".
I'll tell you what I did first, and then I'll tell you what I'd do now, if I had to do things all over again.
At first, I went into the "Boot Camp/Drivers/Apple/x64" folder on the disc, and ran each installer, minus the MultiTouchTrackPadInstaller. I don't think the order matters much, but I ran the BluetoothInstaller before the BluetoothEnablerInstaller, just because it seemed appropriate. WiFi can be enabled by running BroadcomInstaller64 in the Broadcom folder, Ethernet can be enabled by running MarvellInstaller64 in the Marvell folder, and the Intel Chipset can be enabled by running the Setup file in the Intel/Chipset folder. Also, as a precaution, I downloaded the latest graphics drivers for the GMA X3100 from Intel's site, but I don't know if that's going overboard or not. Sound can be enabled by the RealTekSetup file in the Drivers root, and I think that's about everything.
What you'll find after all this is that the media/brightness keys do not function. I'm guessing that the Boot Camp system tray utility that remaps these keys properly is what is installed by the Boot Camp installer, so I was looking for a way around that.
If you do a search on The Pirate's Den for "Apple BootCamp 2.0 Drivers (including new 64bit-drivers)", you'll find a .torrent available for the Boot Camp drivers that came with the Mac Pro. I ran the BootCamp64.msi installer there, and it ran an installer that re-installed just about every driver package, but it also installed the system tray app that enabled all the media/brightness keys. Nice!
So, if I had to do it all over again, I would start off by running the BootCamp64.msi installer on the Mac Pro drivers disk from the start, and see how the system behaves after running that. Then I'd go through and identify the missing drivers (I'd guess the Intel chipset would be one that wouldn't be installed properly...but I could be wrong) and install those packages from the MacBook drivers disk.
The only issue I'm experiencing now is I sometimes have a pop/crackle issue with the RealTek drivers. I'm trying to figure out a workaround, but I wouldn't be surprised if this was due to me installing so many iterations of the sound drivers....we'll see.
Anyway, good luck! Hope this information helps.