The sheer ignorance in some of these posts astounds me. There is nothing "unstable" about the AMD64's. In fact, they run so much cooler than P4's. And even proved their stability in the THG dual-core competition (if you can read between THG's biased lines). I've been running a dual-boot XP/x64 system since RC1. Been running x64 almost exclusively (though still dual-boot) since RC2 and now running dual-boot but still almost exclusively x64 with the final OEM release. My games run better. My system performs better. True there are a lot of driver issues to work out still. Chipset drivers are pretty much set (Nvidia and Via at least anyway). Video card drivers are good for Nvidia, not so good for Ati though admittedly. Printer drivers are lacking as well as some mass-storage drivers. But even in spite of all that, x64 is worth it for those who don't mind spending a little time tweaking their computer. Sure, x64 may just be a stepping stone to 64-bit Longhorn, but it's still here and ready.