There must have been some problem with the feeds (Corey, where are you, help!)
On my Zune (no MS jokes, your iPods won't work either) it actually DL'd and added last weeks discussion show under the label as this weeks email show.
Also, as someone else pointed out, the link on the listen now page plays last weeks email show. The Flash player pulls it up, but I have not yet figured out how to get it on my Zune.