Dan Carlin`s Hardcore History
I will not make it a habit out of talking about other peoples projects but Hardcore History is something you will want and like to hear. What you should do is get your iPod/Blackberry ready for some interesting history lessons. You can download the episodes from here.
Mike Duncan`s History of Rome
If you are into Ancient Rome the you would love this. This is the first ever podcast i really listened to and belive me, you have what to listen to. Click here to take a look.