In very exciting news, I just discovered on George R. R. Martin's website that the fourth book in his Song of Ice and Fire series has, at long last, been completed.
It's been a few years since I read A Storm of Swords (book 3 for the uninitiated) for the first time, and a lot of folks were starting to wonder if Martin would ever get Feast for Crows (book 4) finished. He explains some of his decisions for this book on the website, and I'll be very interested to see how it all pans out.
The first three books (Game of Thrones, Clash of Kings, and Storm of Swords respectively) are, for my money, the best written fantasy novels since Tolkien basically invented the genre with The Lord of the Rings. If you haven't read them yet, you're really missing out on some of the best writing last decade has to offer.