I was looking at Waterstone's in-shop magazine yesterday (didn't buy it because it's £1.99 and I'm tight) and there was a tiny paragraph about The Children of Hurin - it said something about "anyone who's ever struggled with The Silmarillion...."
Way to go Waterstone's! Not. I think that might put a few prospective buyers off Children... and judging by the amount of Harry Potter advertising all over the shop it looks like there will be no Children Of Hurin release date midnight opening....