I listen to a lot of podcasts. These are the six that are currently "must listens" while I'm driving. They're focused on marketing, design, and technology

1. My 6 Favorite Podcasts (this week) by
@JimMacLeod

2. PnR: This Old Marketing
Content Marketing with Joe Pulizzi and Robert Rose of The Content
Marketing Institute

3. Deeply Graphic DesignCast
The web & graphic design podcast that offers both practical and creative
design advice you can use. Hosted by Wes McDowel, Mikelle Morrison, &
Nick Longo

4. S.M.A.C. Talk Live
SMACTalk is a 30 min weekly show discussing innovation, tech and
S.M.A.C. hosted by @DanielNewmanUV & @iSocialFanz

5. The Email Design Podcast
The only podcast devoted to the art of email design. Hosted by Kevin
Mandeville and Jason Rodriguez of Litmus

6. The Dirt
The Dirt is a podcast from @freshtilledsoil about the Web, UX, and Tech
hosted by 3 superheroes: @csskarma, @stevehickeydsgn &
@markgrambau

7. Tech in Boston
 Podcast (2x/month) & weekly newsletter from @davegerhardt sharing
learnings from the people building companies in Boston.