Well, x64 Windows XP and Server 2K3 versions have long been awaited and they are finally here. Two days ago, at the WinHec convention, Bill Gates introduced these two versions into the Windows OS family. Now we only need Whidbey and Yukon on 64-bit and the rest will follow. You can watch a webcast at the following url:
http://www.microsoft.com/events/executives/billgates.mspx