Great podcasts to check out:

1. This Week in Technology (twit) - Leo Laporte & friends.
   
   

2. Security Now - Take two geek pills before consuming.
   
   

3. Fresh Air - Superb interviews
   
   

4. Tech Nation - with Dr. Moira Gunn
   

More ideas in the thread,
http://feedback.pdxradio.com/topic/favorite-podcasts and at Podcastawards

How to get podcasts:

1. Go to the podcast’s web page, download the mp3 file and copy to your player for portable listening.
   - or -
   

2. Use probably the easiest and best Podcast aggregator, Apple’s iTunes.