I've been running the Windows 7 64 bit Release Candidate for a couple of weeks after having tested it with a dual-boot setup. The test included all my regular apps. including PS CS4, LR 2.3(,4), and two 64 bit plugins. Since W7 uses the Vista driver model, I had no hardware problems. Some drivers balk at not recognizing the OS, so I had to right-click the driver setup file and run it in Vista compatibility mode. It's very pretty, slick, and I'm sure very 'Mac-like', but I don't care about any of that. To me an OS needs to get out of the way and run programs as efficiently as possible. It also helps if the OS is intuitive enough to not make you have to go lots of places and use lots of controls to accomplish common tasks. I don't know how Vista did it (I skipped that, and came from XP x64), but W7 does a great job compared to XP. The 'Devices and Printers' window will let you do anything you'd ever want to do to your hardware in one place (printer settings, hard drive format, monitor settings, camera etc. without going to 'Computer' or 'Device Manager'...). W7 also accesses storage faster and has native support for SSD's. I can't go into all of it, but it's working great for me in all my photo stuff, and everything else. It's lean, fast, intuitive, OK and yes pretty. It's available now at a steep pre-sale discount. An upgrade from XP or Vista is $50 until July 11 (both 32 and 64 bit versions are included on the DVD). After that the Home Premium upgrade will be $120. The full version will be $200. It's a free coupon with any new Vista/PC purchase. It ships in Oct.