Want one show but not the whole subscription? Want to pick the individual episodes from podcasts that you're interested in? Kevin at Feedblog points out that with Feedburner you can use your feed instead of the show's feed...

I can just link to the [original show's] .mp3 in my blog post. Feedburner should be smart enough to add an enclosure for the .mp3 file and then I can subscribe to my feed within iTunes.

A meta-feed of a feed of a file.... oh, the boxes within boxes will make you crazy!! Masterful strategy for picking your podcast, though!!!