VMware Fusion Beta 3 now supports Apple’s Boot Camp. VMware Fusion is virtualization software that allows Windows XP to be run at the same time as OS X (It doesn’t yet support Vista).
VMware Fusion automatically detects your Boot Camp partition, so you can now run a Windows XP virtual machine from your existing Boot Camp partition. You no longer have to choose Windows or Mac: you can now run Windows side-by-side with your favorite Mac applications. Note: For this Beta 3 release, Windows Vista is not supported; only Windows XP is supported.