The list of podcasts is here.
Here are the ones I listen to:
1. Reasonable Faith – William Lane Craig
6. Defenders Podcast – William Lane Craig
11. Intelligent Design the Future
But there are a bunch of new ones I had never heard of in his list. Check it out!
And let me just plug a podcast that is not related to Christian apologetics: the Investors Business Daily podcast (RSS link). This is by far the best podcast available on issues ranging from economics, to foreign policy to social policy. I highly recommend this podcast.