Virtualbox, the cool virutalization solution from sun, supports 64 bit hosts, but their download section refers to this installable as AMD64 confusing at least some (including me 
) . So go ahead and download it (though it says AMD64) to your favorite windows 64 on your Intel 64 hardware (Core 2 Duo, Core 2 Quad, Core i7 etc) and enjoy..
http://www.virtualbox.org/wiki/Downloads
