Don't feel so bad I got a Athlon 64 3000+ and I only run 32-bit os's on it. your chip rocks if you have a 64 or 32 bit OS. Its still a fledgling technology that will be java and flash ready soon.
you can also chroot to a 32bit os to use it as well to get the best of both worlds. But don't go back to windows, apparently its a bad time right now so I hear.