Well, as the title says - the AMD X86-64 simulator is shipping (for Linux only - for now). You can go here and read the details. It is called SimNow!. Unfortunately, the kernel 64 bit port is not done yet, but hey, you got a nice simulated machine to play with! It's available as RPM for RedHat 6.2 and SuSE 6.4. NOTE: - you'll need PLENTY of RAM to operate this simulator! (384MB RAM is minimum) and disk space - 4 GB! So think before you download this beast!