I was recently asked for some podcast recomendations. I listen to a bunch of them.
This Week in Tech
http://twit.tv/ (You might also like This week in Google)
All Songs Considered
You can listen on the website or just search on iTunes. There’s also Google’s “Listen” app for the droid that auto downloads podcasts on your droid. Search for it in the market place or scan the QR code. I love this app, it makes my morning commutes disappear. (iTunes works on the iPhone/iPod/iPad, but it doesn't auto sync or auto download directly onto your phone.)
Lastly I continually change what I listen to, I add new podcasts and drop old ones. The latest version of "Listen" can integrate with Google Reader so I can share all the items I listen to.