Currently Being ModeratedFeb 1, 2013 3:03 PM (in response to NextWaveJoe)
Your feed has three episodes: none of them has the 'enclosure' tag, containing the URL of the episode's media file, which is necessary for iTunes: indeed there is no reference to a media file at all.
Each episode has a link leading to a Squarespace page with an embedded media player. This won't work in iTunes: you have to provide a direct link to the actual media file - the test is that if you enter the URL in Safari it plays in an otherwise blank window in Safari. The URL must include the extension, e.g. ,mp3.
This page on podcasting includes a sample basic feed so that you can see what one should look like.