PeaPodder

I wanted a podcast app that would automatically allow me to start listening to older episode, and automatically fetch and listen to progressively newer episodes.
I'm sure there are other solutions out there, but I wanted to scratch my own itch and build the exact app I wanted to use.
Note that if this app becomes too successful, I'll need to implement some sort of subscription service as the api I'm using to fetch podcast meta data has a light weight free plan.