On Windows or Mac, I really like how itunes manage my list of Podcast. It can download the latest episode while deleting past ones and collapsing an entire series in its own group. I also like how easy it is to have a customized list of my favourite Internet radio station.
I used Rhythmbox on Ubuntu but it does all the above in a very wonky sometimes hit or miss way. Can anyone recommend a music player on Ubuntu which can do the above perfectly?