Sources tell me that Ottawa human rights lawyer Richard Warman has launched a defamation suit against Sun TV. His suit pertains to an episode of Michael Coren's The Arena on which fellow Sun TV employee Ezra Levant guested. I have also learned that Kathy Shaidle of Five Feet of Fury has been served as well; I believe this is for hosting the episode in question on her blog.
This may be history in the making. Unfortunately, George Soros abandoned his suit after Fox News North issued a grovelling apology, so this will almost certainly count as the first one to go forward against the struggling network.
Note: I should note that Soros actually threatened to sue the T.O. Sun for a column Ezra wrote; he did not sue Sun TV.