Podcast

If your podcast is an MP3 file, use the following HTML code to embed your podcast:

<embed type="application/x-shockwave-flash" wmode="transparent" src="http://www.google.com/reader/ui/3523697345-audio-player.swf?audioUrl=URLOFAUDIOFILE" height="27" width="320"></embed>

You will have to click on the HTML button to be able to insert this code. Don't forget to substitute the address of your podcast where it has "URLOFAUDIOFILE"! (If you uploaded it to Google Docs, it will be the "open" link.)

Source: https://sites.google.com/site/mistersill/audiotest

If your podcast is a video file (mp4), upload the podcast to your YouTube account (using your Google ID), and embed the podcast using the Insert > Video > YouTube menu.