[thirdsun]

Radiolab - I love the fast cuts and interesting sound design. Of course, the content is top notch too.

This American Life - Probably the most popular podcast with a long history and an impressive track record of exciting stories.

The Bike Shed - new Ruby/Rails-related podcast from thoughtbot, really like it.

Pragmatic - in-depth coverage of certain technical topics.

The Truth - fictional stories, very good writing, high production values. Feels like audio-only, high quality short films.