This really surprised me:

Apple® today introduced Boot Camp, public beta software that enables Intel-based Macs to run Windows XP. Available as a download beginning today, Boot Camp allows users with a Microsoft Windows XP installation disc to install Windows XP on an Intel-based Mac®, and once installation is complete, users can restart their computer to run either Mac OS® X or Windows XP. Boot Camp will be a feature in “Leopard,” Apple’s next major release of Mac OS X, that will be previewed at Apple’s Worldwide Developer Conference in August.

If there were ever a reason to switch, here it is…