Hi Graham,

Your blog regarding Think Atheist radio doesn't really fit our blog guidelines; however, I may be able to answer your question all the same.  Think Atheist Radio runs as a podcast online.  You can either access it though iTunes, (http://itunes.apple.com/us/podcast/think-atheist-blog-talk-radio/id429902222) or you can access it on your web browser here: http://www.blogtalkradio.com/thinkatheist

You can access all of the past episodes and the new episodes as they come out (usually Sunday or Monday).  

Hope that helps,

Kris