I listen to the podcast of Real Time with Bill Maher pretty regularly, but the feed is annoying in that it includes both audio from the show (which I want) and video excerpts (which I don't want). I made a Yahoo! Pipe that filters out the video entries; RSS (which can be used as a podcast URL) is here.
Update (1/30/2011): For some reason, the first link to the pipe doesn't actually show the recent Maher audio podcast entries, but the second link to the podcast URL works fine. To add the podcast to your podcatcher, right-click on this link and copy the URL ("Copy Link Location" in Firefox), and then add the feed to your podcatcher (in iTunes on Mac, do Advanced -> Subscribe to Podcast... and then paste the URL).