That's not exactly news, it happens all the time. Ever been to a singles bar?
So far, they've only mapped about 60% of the genome. But by comparing it to modern man's genome, they found a 1 to 4% overlap between Neanderthals and non-African DNA, about 100 genes. They don't think it did anything from an evolutionary perspective, but as far as the difference between the species when they diverged, it's actually quite fascinating. No clue what it portends, but it's still fascinating.