With whimpy it looks to me like podcast is a proprietary software for this given this page meaning they work hand in hand with displaying feeds.
http://www.wimpyplayer.com/products/mp3/podcast.html
My honest feeling here is that if your trying to do something more than add a link to a page that our software could have to be modified extensively to perform the same functions as a podcast.
Most software can be modified to perform functions it is not necessarily written for however the most important aspects to consider before purchase would be either do you have the technical knowledge to modify the software to perform as you would like or would it be economically sounds for you to pay outside coders to modify it for you.