This is an excelent podcast regarding Quantum Computing. (Check the rest of the website Omega Tau for more hidden jewels)
I have to say that it is not very basic so you need to know some concepts and terms to fully appreciate it.
I wish these had a video version, is one of the best 1 hour specials I have seen so far.
You can listen to it online or donwload it.
From the source:
In this Episode, we talk about quantum computing. Our guest is Martin Laforest from the Institute for Quantum Computing at the University of Waterloo, Canada. We start with some physics basics, and then cover topics ranging from how quantum computing works, which different models of quantum computing are explored, current and future uses of the approach as well as the current state of the art. This is one of the more propellerhead-oriented episodes, so make sure you listen carefully