The new Vista Pre-RC1 build (5536) works now on Intel Macs. The installation procedure is the same as with Windows XP SP2. The only down side is that not all the drivers provided in Boot Camp will work under Vista; the iSight and the Apple keyboard will not install. The performace of this build is amazing when compared to the Beta 2 that was made available to the public a few months ago. All the bells and whistles of the new Aero GUI are supported on my MacBook Pro, and according to online reports even the plain MacBook supports all of the new effects.