The most recent Planet Money podcast is also about patent trolls, and goes into a bit more depth about the guy who declared himself a co-inventor of podcasting.

http://www.npr.org/blogs/money/2013/05/31/187374157/episode-...

EFF's effort to find prior art and raise money to fight this particular troll can be found here:

https://www.eff.org/deeplinks/2013/05/help-save-podcasting