Are you using it to score leads? Or trigger off real-time website behavior?
I suggest you take a look around the http://developers.marketo.com/blog and see if there's something that you can find Munchkin can do for you. The Developers blog is a great source of inspiration on ways to leverage the Munchkin script.
Essentially the same question from a couple of weeks ago: Munchkin API Uses/Benefits
I think the question is more What do you want? Munchkin can fill many general and niche needs, though not all. I could be more helpful if you had a particular objective.