It's a good article, but I maintain a better setup is to install os x and then windows in bootcamp as the article starts. But to not bother with the linux 3rd partitioning. Instead linux runs very well inside of a virtual machine, parallels in particular.

The only real need to dual boot into windows instead of running it in a virtual machine is to gain all the graphical advantages (directx) of windows. Linux on the other hand doesn't rely on directx and runs perfectly happily in a vm.

You don't need parallels either, you can use any number of free virtual systems to do it. But parallels allows you to use your bootcamp partition as a virtual machine so you can access your windows partition both ways. It also has support for up to directx8.1 plus it's coherence mode works really well.

This doesn't take away from the article is really well done and straight forward. I'm just suggesting there is a more optimal way of doing it.