The frontpage of the Drudge Report shows that Stern says CBS Radio will sue. I can't open the link.

The story probably comes from New York Post's Page Six column who is reporting that CBS/Infinity Chairman Les Moonves is considering a $500 million lawsuit against Stern for breach of contract, due to failing to disclose the specifics of his Sirius contract to his bosses at the time.

"When you mention the name Howard Stern to Les, his face turns red and his rage becomes uncontrollable," said a CBS insider. "And Les has a bunch of Washington, D.C., lawyers who hate Howard almost as much as he does."

Until something is official, we're gonna file this one as a "rumor" for now.