Me & My Shadow

Is there a particular podcast length you folks tend to prefer?  I've got a super-sized Harvest podcast, (it's being converted to .mp3 format as we "speak"), and I'm wondering if I should break it up into small "pods."  (Is that where "podcast" comes from, or is it just in direct reference to the iPod?  Hmmm...)  Anyhoo, I feel like it's cheating to make "shows" of just a few songs apiece, so any help y'all might provide would be much appersheeyated.

Many Thanks! ^_^