Starting up a 2nd GoT thread, this one will contain lots of spoilers with nothing really off limits to talk about in any of the books.
HBO just aired the 3rd episode of Season 3. It started with introducing the Tully's (and saying goodbye to Catelyn's father Hoster). I think they did a good job of introducing us to Edmure and the Blackfish. Changed things a little bit from the book (both were introduced earlier in the books) but I think they did a solid job of pretty quickly introducing us to the dynamic between the Tully's.
There wasn't much action elsewhere. I think they did a really good job with Dany and north of the Wall, but the stuff with Tyrion and Pod was pretty dumb and I've got no idea where they are going with Theon. That's completely different than in the books. I'm not sure if I'd believe that Dany was willing to pay a dragon to get all the Unsullied (if I didn't know what was coming). I have really enjoyed Dany's stuff in Astapor this season so far, and think the guy playing Kraznys is awesome. Gonna enjoy seeing that come to a climax!
They switched up how Jamie comes to lose his swordhand, but I think that it works great all the same. Instead of the Goat, who may have come across as silly on the screen with that lisp, it's the manager from Almost Famous and he seems to fit well here. I also think it's good that they're flying Bolton banners, as that will make what ends up happening there make a bit more sense.