Yes yes, I know you were expecting to get the final installtion of the Grey's Anatomy Season 3 predictions today about Meredith but sometimes suprises are good. So today you get Addison.
She's over Derek and has been over him for a while. Why's she still all up in him then? Guilt. She's a cheater is desperately trying to disprove the once a cheater always a cheater bit. She's so out of Seattle. She had tried to leave several times last season but unfortunate circumstances and problem patients kept her. Not in Season 3. Her ass is gone. I can't even fathom a guess where she's going but it's going to be far, far away so she can start her new, Derek-free life. She might come back in Season 4 but I wouldn't bet on it. She won't be in more than the first episode.