I do listen to many podcasts daily and find lots of time to do that (commuting, housework etc. similar to Brendan's experience above) I am a confirmed NPR/BBC/CBC and overall public radio addict.
A few things learned: 1) Set itunes to only retain the latest edition of a podcast. Do you really need to listen to every single episode? Why? If you never listen to a particular sub, axe it! Life is too short and there's plenty of good stuff out there.
2) Create podcast playlists in itunes. For example, I have a playlist called "Channel One" combining many short (10 min or less)
items (eg. NPR's "business story of the day" ). It's a lot easier to listen this way and big fun to have customized meta-radio stations. Organized information can be far less overwhelming.
You can create separate 'stations" devoted to arts, travel etc. - the content updates automatically of course. To really go all-out, create playlists combining your music and podcasts (hit shuffle!:)). Possibilities are pretty much endless.
3) this stuff is supposed to be fun!
Does timeshifting work?