Can someone explain all the fuss? We know that horses and donkeys can interbreed (mules), mules are pretty stable animals with no weird-beard health problems. I believe that horses and zebras can interbreed.
Probably a lot of other examples exist. "Species" seems like it's a lot more porous than elementary school biology would lead us to believe.
I think it's basically that prior to this finding, the general though was that humans wiped out the neandertals by being better hunters etc. but it now looks more like humans may have absorbed them into the gene pool.