Any chance of getting a non-Silverlight version? I've got the usual Mac biases against installing large pieces of Microsoft technology on my machine. :)
I agree with you very much about not installing unnecessary software components but unfortunately, ACS does not provide any alternative.
Out of curiosity, who owns the copyright to the presentation? Are you able to transcode it to another format or extract the audio? Did you sign something so they could make the recording?
It is the presenters who own the copyright. After a few emails with ACS, we got an official permission to extract the audio from the presentations published on the ACS website. So, we will re-publish a non-Silverlight version of the presentations soon on this blog.