Over the past few years, I've done a lot of presentations on x64 technology as it pertains to game developers and DirectX technologies. Here is a collection of links for developers interested in learning more about the Windows x64 OS and x64 native programming generally.
Technical Articles
Blog Posts
Technical Articles
64-bit programming for Game Developers (DirectX SDK)
RAM, VRAM, and More RAM: 64-Bit Gaming Is Here (Gamasutra)
Blog Posts