OS wars at the top level...??
Microsoft has announced that the upcoming Vista OS will never be compatible to boot on Intel Macs. Although Microsoft had earlier stated that Vista would support EFI booting, which the new Intel Mac's run on, the decicion is based on the limited availability of EFI ready machines.
See.....http://apcmag.com/apc/v3.nsf/0/E666E4A0A303D9AACA25712C008166C4