The Totem media player on Ubuntu has the ability to download the current podcast list from the BBC with minimum fuss. It's great for catching up on missed BBC radio podcasts when I've been out of the UK or too busy to hear them in real-time.
To get to the podcasts, fire up Totem with Applications->Sound & Video->Movie Player and then on the Playlist drop down (top right) select BBC and in a few moments Totem will have downloaded the contents index and you can browse and select the podcast you desire.
Pity this feature isn't promoted more. It saves one from rummaging around on the BBC website looking for relevant podcasts. Totem-tastic!