Update: Paul Miller from Talis updated me with some new information.
I just recently stumbled upon Talking with Talis, a blog by Talis that hosts podcasts they've created from interviews with various people in the Semantic Web community. In their archives you can find nearly 60 podcasts, and this number is growing. The podcasts are fairly lengthy too, with most ranging between a half-hour to an hour long. For convenience and reference, each podcast entry lists the sites they talk about during the conversation, which makes following along easier.