Below you will find the slides and accompanying sample project that I presented at the January 2008 CocoaHeads meeting in Syracuse, NY. I posted both the Keynote presentation and the PDF export of said presentation. Because it was an informal gathering I decided to use a few of the Keynote transitions that are fun, but maybe a little over the top. If this kind of thing bugs you, rock out the PDF version, it just has the slides.
Also, during the meeting a few folks asked about playing sounds and doing speech synthesis, so you will see simple examples of those technologies used in the sample project as well.