Go to blog called "Mind the Racket"..they have a pretty good one called "the changeover podcast". Don't know what happened to Andy Zodins "In the Tennis Zone", but it was good. Best was Courtney Nyugen's "Forty Deuce Podcast" which is sadly done now that she is bigtime at "Beyond The Baseline" on SI.com.
for a real opinionated weird one try "This Week In Tennis Podcast" by some dude Phil Naessens...apparently he is some "Pro" at a Greek resort who gives his opinions, sometimes well thought out and other times kinda biased and with no merit.
Basically not much to choose from...would love to hear of more.