At WordCamp St. Louis 2012, I presented WordPress Custom Post Types. I was honored to present this and frankly, it was a great challenge to undertake as I had to use my own experience as even consult some of the previous presentations on the same subject in order to produce a presentation I could be proud of.
Custom post types are great for users wanting to add more functionality to their websites beyond what the default out of the box install of WordPress offers.
I hope my presentation is helpful. I have included the Microsoft PowerPoint slides and the podcast so you can follow the slides as the podcast progresses. Please feel free to ask questions.