Seriously, with all the tangential characters and storylines he's thrown in, it doesn't seem possible. I'd always heard the plan was to wrap up all the storylines that have to do with the battle for the Iron Throne, then jump ahead like 15 years for the final book (taking us to the end of Winter) where they finally fight the White Walkers/Others on a large scale. But it seems like it's going to take more than a book to wrap up the fight for the Iron Throne and whatever is going on in Essos. Shoot, winter hasn't even come to the South yet.

>Storm of Swords *should* be two seasons; that was smart. after
>that, they need to ditch the book continuity and just pull the
>most interesting story lines from A Feast for Crows and A
>Dance With Dragons. neither book "works" as its own season of
>television.

Yeah, I gotta imagine that's how it will work. HBO is not going to want to market an entire season without Tyrion, much less no Jon Snow and no Dany. And I don't think anyone will want to watch it. And I imagine a lot of the other characters introduced in four and five fall by the wayside. The cast is crowded enough already.