There were some new details that weren't there, courtesy of my wife skylark:
Victarion
The horn is an actual horn from a dragon. Bigger than Balerion.
Victarion is feeding the horn his own blood from his black fire hand. He's doing this to bind it to him, so that when the horn is blown the dragons will go to him.
Victarion's black fire hand - the one that was injured - appears to be significantly magical. It still is black and charred, but now smokes with his rage. One of the details was him putting on all his armor and clutching his fist while saying 'he pities any many who tried to stand before him on this day' and smoke rises from his gauntlet.
The three thralls might be important but it's not clear. One is a bastard's bastard, one is the young one, and the third wasn't clear. The young one speaks a lot, and Victarion normally would beat him but he's likely to die anyway.
The three thralls have been promised freedom and a ship if they survive after the blowing.
He fingerbangs the dusky woman as he doesn't want to spend himself before battle. Yeah, that would have been fun to hear in person.
Tyrion:
Tyrion is trying to convince Plumm to switch sides...again. The best argument (he makes many) is that Dany will forgive him because it'll be his turncloaking that seals the battle.
One of the other commanders apparently tried to buy Tyrion when he was on the blocks as a slave. she wears a breastplate with a harpy on it. Skylark thinks her name was Melaza.
Penny advised Tyrion to lose some times when playing Cyvasse, but Tyrion can't; Tyrion thinks that if he's not clever all the time, his value will be nothing and no one will want him.
Tyrion notes that Dragons don't care about sides and are very fickle when it comes to burning and eating people.
Brown Ben thinks that Dany will take back Mormont - especially with Tyrion.
General:
Ran & Linda are his general go-to sources when there's a question about things
He hand-draws all his maps to start with on 9x11 paper
The Dothraki sea was a blank sheet of paper with three dots on it, one of them labeeled Vaes Dotthrak. they redid that map
He writes specific characters in a row - for instance, he's written 4 Victarion chapters in a row.
He really likes the new scenes in the show; his favorite was the Robert/Cersei scene in the first season and the Littlefinger/Varys scenes
He wrote Blackwater, but didn't write the brothel scene with Bronn and Sandor; that was D&D.
Magic is on the rise in the world, and there will be more magic in every book going out
It is not clear whether the walkers cause the cold to come or the cold causes the walkers to come.
He has gotten many, many letters from women to do an explicit gay male sex scene. Not a single one from men requesting it.
He confirmed that while he doesn't like it, if you don't see the body chances are they're not dead.