Yeah, Callie&Addie friendship rocked! I miss that so much... at the end of season 3 it was one of the two things I kept watching GA (besides Maddison - or what was left of it - of course) and it killed me they didn't say goodbye.
Lets hope and see what Shonda has planned and I hope I don't want to kill her afterwards . Not only would she have set my hopes up for nothing, but also made me watch GA again