Okay for those who haven't heard yet, this is coming out in April. SCIFI.com reported about this a while back. Basically, it's the first new Middle Earth book by Tolkien in 30 years. And like the Silmarillion, this is another work of Tolkien's that has been picked up and finished by Christopher Tolkien. The deluxe edition will feature illustrations by Alan Lee.
Here's what the Tolkien estate says about it:
The Children of Húrin takes the reader back to a time long before The Lord of the Rings, in an area of Middle-earth that was to be drowned before ever Hobbits appeared, and when the great enemy was still the fallen Vala, Morgoth, and Sauron only his lieutenant. This heroic romance is the tale of the Man, Húrin, who dared to defy Morgoth's force of evil, and his family's tragic destiny, as it follows his son Túrin Turambar's travails through the lost world of Beleriand.
Here's the wiki on it: http://en.wikipedia.org/wiki/The_Children_of_Hurin
And I'm pretty excited about it right now, in part because I've just arranged for AICN books to get a review copy. Yay us.