http://www.usatoday.com/life/2006-04-27 ... ions_x.htm
New spoilers
04/28 - Richard Burgi reveals: [The breakup with Edie] doesn't go over very well. It's met with some, uh, anger, as you could imagine, and a buildup of venom. I think [Edie] gets a little "hot." She puts a little mojo out there. All kinds of things happen as a result of it. The fallout is chaotic and widespread. [Edie will soon learn that Susan is the other woman.] She finds out with some prodding and assiduous investigation. Once she finally comes to terms with it, she takes action and it's, uh, not pretty. Source: TV Guide Online
04/28 - Richard Burgi reveals: I've heard that rumor [about Susan discovering that she is pregnant].... [Evil laugh] It's very possible that since she and Karl "got together," something comes out of that. But I don't think there's anything I can say about that. Source: TV Guide Online
and video clips for Sunday, the Lynette one is classic.

http://tv.yahoo.com/feature/desperatehousewives.html