I'd like to see GRRM have a "Peter Jackson Moment" in the pilot. In other words, no speaking lines but at least as a notable extra. PJ had some fun little appearances as a carrot wielding drunkard and a pirate in his LOTR movies. If they keep the scene from the leaked script with the drunks staggering out of the bar singing a bawdy song right before the brothel scene that would be a great bit for him to join in. Maybe he could be one of the servants serving food at the Winterfell feast. Or be a kitchen cook since he seems of a better age and, ahem, girth for that? :)