I believe that you can run XP or vista on a mac using bootcamp
http://en.wikipedia.org/wiki/BootCamp
In fact i believe leopard the new OS for mac has Bootcamp as standard
http://www.apple.com/macosx/features/bootcamp.html
EVERY new mac now also use Intel processors too.
http://www.apple.com/intel/
I have never used bootcamp its just what i have read so you
might be able to run hoster on a new mac