Adam, you said at the end of the interview that you are looking for ways to grow your listener base. Well... I guess you got exactly what you were looking for, between interviewing Brian Kernighan and being featured on Hacker News...

That's probably a good formula to go by: get interviews with "big names" who have done incredible things in the field, make the content as good as you can, and submit to HN.

Personally I would love to hear an interview with Fabrice Bellard, if you can get him. That man is a true "superstar" of programming. Interview Fabrice and you have my subscribe, 100%.