I had read mixed reviews about people installing 64-bit Windows 7 on the MacBook Air. It went really well for me, I think. A few small things. One, when putting the OS X 10.6 disk in to install Boot Camp on the Windows OS it says something like "the MBA doesn't support 64-bit Windows." I read from someplace on web to go into the drivers/Apple/x64 folder on Snow Leopard install disk and double clicked on each driver file inside Windows 7 to install each driver. Each driver took a few seconds and showed positive results. I then clicked on the Windows Update. If found an Nvidia 9400m graphics driver. After that updated, I went in and checked the devices. The "MBA" chipset drivers were showing as not installed. I went to "find and fix problems." Sure enough there was an error stating there was a 100 MB file to install the 64-bit chipset for Windows 7. I clicked and let that install. I then used Windows 7 on the MBA, and so far I haven't had any issues. A few weird things. When I was installing, it didn't ask me how I wanted to format it, NTFS or FAT. Maybe that's a difference with Win7 from Vista. My instruction set was from BootCamp for Vista. Next, the buttons to control display brightness and function keys aren't working. I didn't take anymore time to figure those out. I have read some who have everything working perfectly. I just wanted to report that somehow Windows 7 Professional is working in 64-bit on the MacBook Air. BootCamp doesn't install in the Windows OS side, but works fine just the same and can boot into Windows 7 by pressing the option key during startup and selecting "Windows." The performance of Windows 7 on the MBA is a dream. I am truly impressed with the MacBook Air's capabilities... it's just too bad OS X doesn't fare so well on the MBA. I really don't understand why Apple doesn't want us to boot 64-bit on the MacBook Air in Windows 7??? I guess it must be fairly embarrased that Windows 7 works better and faster on the MBA than OS X and OS X Snow Leopard isn't really even 64-bit. If the CPU and chipsets are capable, why does Apple feel the need to cut performance and limit our capabiltities??? I rarely use Windows, and I didn't really need to install it as I have a Windows computer. I just wanted to share the results of installing Windows 7 on the MBA. I guess 32-bit would have went safer... I really don't understand why Apple isn't officially supporting Windows 7 on Macs yet? Doesn't it seem that would be a requirement given its claims of running Windows on Macs? I will post any other findings over the next few weeks.