The tittle says it all... Though many doubted that this day would come, it is finally here. George R. R. Martin himself has confirmed the release date as official. Why is that signifigant? Because people have tried to give this book a release date before and he has always staunchly denied it. Not this time though! GRRM says he isn't completely finished with the book, but what he has left is so small that they have gone ahead with the date and that date is...
Mark your calendars, folks!
George said on his website that the book is, "A Monster" comparable to the size of A Storm of Swords.
Here is a look at the most recent cover design for the book. Whether they are going to go with it or not has yet to be decided.