I think albums of music and podcasts are very similar and I see both them very different from radio. Unlike Dave, I don’t want my podcasts automatically deleted, I would like the ‘Save’ or ‘Delete’ option just as I do on Tivo.
The iPod/iTunes assumes everything is precious (it’s not), automatically deleting assumes nothing is valuable (it is). Both assume a scarcity. Either a scarcity of storage space or a scarcity of access. 10 minutes from now, we’ll have neither. Any podcast I’ve downloaded over the past 3 year is more than likely in 1 of 2 places: my iTunes library or the Internet. Somewhere.
The scarcity we need to solve is context – a way to gesture why I saved something and kept it close.