The chips are not available yet but AMD has already launched the logos for their AMD 64 bit chip series. Read more for the other logos.
The Inquirer has this to report: Here is the pretty eyecandy. The chips themselves will come later. The logic of the logos, according to Rich Heye is that people can carry on using their 32-bit software and hardware now and then "migrate to next generation technology at their own pace". That means that when Microsoft introduces Windows for AMD64, probably in the first quarter of next year, you'll be able to upgrade to that OS and to other software apps or games when they're released. The games might well be first. The logos are for its Athlon 64 and the Opteron, but the idea is to market the chips as AMD64, suggesting a family rather than a set of distinct microprocessors, whether for servers, for desktops, or for notebooks.