For those who are interested in finding out more about various element of music, I’ve found the Pandora Podcast to be pretty interesting, educational, well produced, but way too short. You can learn more about techniques of drumming, vocal harmonies, vocal recording and guitar effects for example. Being in an audio format is great because you can hear examples of what they’re talking about. Plus, there are more resources on the episode web pages.
It’s been useful for me as a guitar player to get more insight into areas I might not be so familiar with on the specifics. With each episode being eight or nine minutes long, I alway find myself wanting more when it’s done.