In order for you to run the question/answer part of the code you'll need to get a product key from Wolfram Alpha. Then go into index.html and find all instances of <INSERT WOLFRAM ALPHA KEY> and replace them with your api key.
Also, David grabbed a pretty good picture of me contemplating life, the universe and everything in-between right after my talk. I think it is just begging for a funny caption.
Do your worst, or best, internets.