Hey guys, I keep mentioning the podcasts I usually listen to... so I decided to add the link at least to Austin's.
He had Ken Shamrock... and it was very interesting to listen to his story... the first part was his rough upbringing... second one was related to his introduction into Pro wrestling and then going into MMA... I also though it had been the other way around... But anyway... there are plenty of very good interviews...
Also Jim Ross' is pretty good, as well as Jericho's.