With that over, we now hit the most boring book with book 4 (after next weeks wrap-up episode). Hopefully they do something interesting with some of the story changes they made, because book 4 was a drag while book 5 at least had some interesting points in it (despite both of them happening at the same time chronologically in the overall story).
Also, GRRM has stated that the show will probably require more than the signed on 7 seasons and possibly a movie to conclude. I doubt HBO will complain about more seasons considering the money they make on GoT alone. He also said that if you donate 20000 pounds/euros/dollars/whatever currency matches up to a charity thing he's doing, he'll put your name in a book yet to be released and kill you off in some gruesome fashion (along with some other stuff), but said reward will only be for 1 man and 1 woman.