MSDN TV Demo of Excel Services by Danny Khen and Me
They even put it up on Office Development Center.
Well.. I learnt the following doing this:
1. Sitting for 25 minutes saying nothing is as dumb as it sounds. :)
2. The camera does indeed adds 30 pounds - in real life I weigh 100 pounds and am a blonde bomb-shell.
If you are actually going to watch it, make sure you disable popups - they will kill the demo.