I've been somewhat following this patent troll when I heard NPR interview a spokesperson (maybe the guy who got the original patent?). In the interview the guy talked about making audio tapes and mailing them off to subscribers and what a novel idea that was that he got a patent for it in the mid to late 90s. (Wish I could remember the date of the patent.)
The funny thing is that with my LaQuinta frequent traveler membership I used to get a cassette tape to listen to once a quarter while I played road warrior in the early 90s. It had inspirational chats with Zig Ziglar, games, and road warrior tips. It was more podcast like than what this guy put out much later in the 90s. Not to mention his patent steps on the fact that long distance romances, families w/ members in the military, and grandparents the world over have been mailing audio back and forth ever since the reel to reel.