Working affiliate themes for wordpress ?

I was reading one of my favorites blogs about how people are managing to make some decent income using an affiliate system on wordpress.

If you are like me then you get lots of ideas to do affiliate sites but by the time you design it yourself or have it done you have probably moved on to the next thing…
Been the skeptical guy that I am I was wondering if any one has try it and if is really working? I will appreciated if you leave your feedbacks.

Oh here is the link for that system. http://tinyurl.com/7ovolm7

Here is the video they have