I've got an odd issue with my finally arrived Mac Pro where the Wireless works flawlessly in OS X but almost not at all in Windows 7 Ultimate x64. My first real experience with bootcamp, but I put on all the windows updates and did the bootcamp setup. I'm using an older 1TB Time Capsule for Wifi and it connects with pretty good strength over the standard and the 5ghz channel and shows around 200 Mb/sec speed. It seems to be able to resolve hosts but can't ping them. IE and Firefox go nowhere. Again once I boot into OS X it is all peaches and cream. It was working just fine with our Cisco wireless router at work, even in Windows. Bizarre!