TUAW posted a news story that Mac OS X 10.6.6 introduces subtle changes to Boot Camp

MacNN cites two tips they received noting changes made to Boot Camp in Mac OS X 10.6.6. The first suggests that Apple has dropped support for Windows XP. When setting up a Windows partition, Boot Camp requests an "...authentic installation disc of Windows 7 Home Premium, Professional or Ultimate." XP isn't mentioned.

  Mac OS X 10.6.6. introduces subtle changes to Boot Camp