pipedope:If you haven't been there yet, go to;
http://faculty.washington.edu/ekay/index.html
and watch the streaming video.
The video is great. I watched it several months ago. My favorite thing is the person signing the lecture for the "hearing impaired". I know that this is probably big-time PI but...why.....? If you're already deaf, why worry about clearing your ears? What's the worst case scenario here? Losing your hearing? Wait, they're already deaf!!!
OK..ok...I'm being facetious. No hate mail please.