I'm listening to:
I Sell Comics
The Secret Stash
Stuff You Should Know (How Stuff Works)
Stuff You Missed in History class. (How Stuff Works)
This American Life (NPR)
Fresh Air (NPR)
They are all more entertaining than Howard 100 & 101.
All I am really lacking is a decent comedy podcast. Tried Adam Corolla but I kept falling asleep listening to it.