Cachers of the Round Table Episode 35 has some really great tips and guidelines for being a responsible finder and hider of caches. I personally think every geocacher - new and/or experienced - should listen to this. Great show guys (and gal)! Listen at their site.
This podcast is a group effort of different geocachers from other podcasts who get together once a month to discuss a variety of topics. It is normally aired on the first Thursday of the month.
From their site: