This is one that comes up more and more lately. How do I run Windows on my Mac? Systm has an episode that is just for you.
I was following along with Tom as he played with bootcamp, Parallels and VMWare. Here he favors VMWare, but says they both pretty much run the same and he thinks Parallels is a little slicker, but also really likes the v2 of VMWare (still in beta).