I did a simple shoot in May 09 for the Zero to Hero Alumni. They wanted to get some photos to use, so out came my equipment!
It was a very simple set up with 2 lights. The light on the right is using the Westcott Apollo 28" softbox, and the light on the left is with a home made snoot or a softbox umbrella (depending on how defined I want the light to be). One light is great, but having 2 lights give more separation between the person and the dark background.
The light with the Westcott was placed higher up and angled around 45 degrees downward, and this also acts like a hairlight, thus eliminating the need for a 3rd light. Simple set up with 2 lights.