So a list and some comments in no particular order,
Lug radio was one of the first podcast I listened to regularly from the start until the end, though they do keep reappearing every now and again. Informal and fun to listen to LugRadio was a great way to stay up to date with Linux stuff and LugRadio Live was lots of fun.
The Command Line Podcast
The Command Line Podcast is one of the most well organised and curated show around at the moment, well written and with very interesting guest its a great show about hacking and technology. The social policy discussion can be at times US centric but even then the show is still very interesting.
This Week in Tech (TWIT)
Leo Laporte’s TWIT network is great, in particular I really enjoying watching This Week in Tech which is just the best way to keep up to date with tech news.
I came across Liunx Outlaws because of Dan Lynch and its alot of fun to listen to and well produced.
This Week in Photo
To prove I am not always working This Week in Photo is a fun show about photography with some interesting interviews and technique discussion. While sometimes these kind of show can feel either beginner focused or advance I think TWIP does a great job of having something for everyone.
DTown, by the guys at Kelby Training started life as a Nikon focused show but now in much more general. To be honest I prefer the earlier hosting partnership of Scott Kelby and Matt Kloskowski but the show is still great. (They have since gone on to present The Grid.)
So there you go they are my podcast choices at the moment all the shows are free as in beer and some as in speech and you can get them through iTunes or RSS feeds. So why not take some past episodes away on holiday this year.