"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."
http://www.apple.com/macosx/bootcamp
System Requirements
Boot Camp requires an Intel-based Mac with a USB keyboard and mouse, or a built-in keyboard and TrackPad; Mac OS X version 10.4.6 or later; the latest firmware update; at least 10GB of free space on the startup disk; a blank recordable CD or DVD; and single-disc version of Windows XP Home Edition or Professional with Service Pack 2 or later