Or is it the other way around? Anyways, don't worry about it; shop
around, and as long as it's "Vista Ready" or at least supports a CPU
with Ring Minus One, you'll be able to run hardware virtualization
(which is what you want).
All AMD AM2 socket chips support hardware virtualization. Finding software that supports
full virtualization (run unmodified OS) vs paravirtualization (run OS modified to run virtualized)
may be hard. Xen supports paravirtualization and Linux will soon ship with virtualization
supported by default.
AMD chips always support enabling virtualization. Intel chips that support VT have to have the
feature enabled by the bios. If the bios doesn't enable virtualization, you can't use it on
that motherboard.