I just wanted to share this because it has taken me days and days to finally get it done and I want to save y'all the trouble.
If you ever want to embed a Powerpoint with Audio onto your webpage:
You can use Wondershare's PPT2Video Pro (Free trial has watermark that nearly disappears) to convert your original Powerpoint File to various formats, but I used MPEG-4, and then use Viddler.com to upload the MPEG-4 file and paste the "embed" code into the "HTML tool" on Visual Site Designer...and voila!
I hope this helps anyone out there~

Camtasia from Techsmith would also allow you to do that also.

PowerPoint for Mac has been able to save .ppts as video for years. Don't know why they did not set it up for Windows versions as well. You'd think Microsoft would work on that.

Apparently, they did:D! Once you mentioned it I opened up PowerPoint 2010 and the Save As has WMV as an option.

So, with MS Office 2010 and CoffeeCup's Web Video Player PowerPoint presentation can be converted to Flash, too.