Running Mac OS X, Windows, & Linux on one machine

A blogger known as Jasbone has created a how-to article describing the steps for installing multiple operating systems on an Intel-based Apple computer. This is almost the holy grail for those of us who prefer the Mac for the 95% of our computing tasks that can be done on the Mac, but need Windows for that other 5% (usually because there's proprietary software involved).

Personally I'm hoping for an officially-supported version of VirtualPC that just runs the two systems side-by-side, but this would certainly suffice.