Closures & Currying in JavaScript

I've finished the blog post about Closures and Currying in JavaScript that I spoke about at the [Powered By JavaScript conference](http://www.manning.com/poweredbyjavascript/). I've also added my bio. 
You don't actually use the level up image anywhere do you?
I remember it was in your original presentation
but it's not in the documents I've been seeing recently
nor do I see any reference to it here?