Listened to it since Day 1. Am subscribed to it through iTunes.
Great show. I remember back in 2007 having started getting into TheForce-Cast, going through iTunes thinking, "Where the freak is an Indiana Jones podcast!?!". Indy-Cast is everything I had in mind. It helped me get into the Indy mood as we approached KOTCS!
I've participated in their contests, but have never bother with writing an email, explaining my "Indyhistory", reviews on KOTCS etc. but its the only podcast I happen to listen to anymore.
I just hope it can stay interesting through 2009 and beyond, as unless Indy 5 or an animated series get underway, shows are probably going to get flimsier now that KOTCS is on DVD/Blu-Ray.