OpenOSX Wintel is available starting at $25 ... acceleration for Intel-based Macs, which OpenOSX claims leads to a 200 - 400 percent performance improvement compared to the previous release.
Universal Binary ... a new preference that lets you use optimized or non-optimized binaries ...
... The CD comes with open source operating systems ready to run on x86-based systems, including FreeBSD, Red Hat Linux, FreeDOS and more. It’s been successfully tested using Windows 95, Windows 98, Windows 2000, Windows NT 4.0 and Windows XP Professional.
Dual booting would be nice, but I think having Windows and Mac apps open side by side is even better.