Check out the new special Drax Files podcast @75 featuring Philip Rosedale talking about High Fidelity and a little on Second Life. This show was broadcasted from within High Fidelity for the first time and the show runs for 1hr/29 minutes.
Skip to 54 minutes to listen to the special interview between Draxtor and Philip Rosedale talking High Fidelity. I found the interview pretty much interesting and fascinating.
Give it a listen if you are interested in learning more on High Fidelity.