At the New York Comic Con on October 10, 2010, Spectra senior editor Anne Groell announced that Martin had only five chapters remaining to finish, with sections of the chapters already completed. She stated her desire to have the manuscript completed by December. In a December 2010 interview with Bear Swarm, Martin stated that he almost has A Dance With Dragons completed.
That means nothing, if you actually read his blog, you can see the horror that is him trying to get through this book. Though I do think he IS actually almost done now, *wishful thinking* Martin got really really sick in December, which held up things alot as well.
I just started reading Game of Thrones the other day. I'm not even past the sample Amazon gave my Kindle, but I'm enjoying it so far. I didn't even realize it was being made into a mini-series. I'll have to watch that youtube clip once I'm a little farther in, and actually figure out what it's going to be about.