Check out this bit on dhawhee's blog. It's funny and weird and the comments after are thoughtful, too.
On a similar note, in my Persuasion class earlier today, we talked about the ways in which different definitions of rhetoric shape the world. This video and the Obama one are basically youtube demonstrations of that--how we talk, the way we engage, and the stories we tell may be (are) more than just bombast.
Plus, singing is cool.