Joe Mullin, a reporter at IP Law & Business magazine, discusses here on his personal blog, The Prior Art, recent reports in The Daily Journal's Tuesday edition that Troll Tracker author Rick Frenkel, and his employer Cisco, has been sued for defamation by two East Texas attorneys who are players in that district's patent litigation scene.

Update: Peter Zura has this Patent Troll Tracker Litigation Update. And Joe Mullin at The Prior Art blog is following up on the recent demise of the "popular and controversial" Troll Tracker blog here.