Howdy - I was talking with coworker this morning with long commute and wrote of a list of podcast recommendations:
1) The Amp Hour: http://www.theamphour.com/
Jeri Ellsworth was the hottest exhibit at Maker Faire Bay Area 2013 featuring her new augmented reality gaming glasses (folks waited up to an hour in line to try them out!). She talks about the tech involved including FPGAs and their plans for metalized gate arrays on , which is sponsored by element14! 
http://www.theamphour.com/the-amp-hour-147-absorptive-augmented-actuality/
Some other great episodes:
- http://www.theamphour.com/the-amp-hour-121-creative-china-commorant/
- http://www.theamphour.com/the-amp-hour-43-audacious-arduino-arguments/
- http://www.theamphour.com/the-amp-hour-84-bunnies-bibelot-bonification/
- http://www.theamphour.com/the-amp-hour-113-sudden-sinoamerican-synthesis/
- http://www.theamphour.com/the-amp-hour-59-bonafide-beagleboard-bionomics/
- http://www.theamphour.com/the-amp-hour-95-feracious-fabless-facilitator/
- http://www.theamphour.com/the-amp-hour-129-device-doubling-decretum/
- http://www.theamphour.com/tag/jeri-ellsworth/
I recommend listening to every episode - I've enjoyed them all!
2) ZombieTech: http://www.tymkrs.com/shows/category/zombie-tech/
Don't be fooled by the name - it's mostly just interviews with cool engineers:
- http://www.tymkrs.com/shows/tag/john-cohn/
- http://www.tymkrs.com/shows/episode/zombietech-episode-050/
- http://www.tymkrs.com/shows/episode/zombietech-episode-049/
- http://www.tymkrs.com/shows/episode/zombietech-episode-048/
- http://www.tymkrs.com/shows/episode/zombietech-episode-055/
3) FLOSS Weekly on TWiT (covers Open Source projects): http://twit.tv/show/floss-weekly
Interesting one for hardware:
- OpenROV: http://twit.tv/show/floss-weekly/226 (click icon for Audio version)
4) Additional podcasts:
TGIF,
Drew