All the article says is that Asus isn't going to make OEM boards for Intel under contract anymore. Doesn't mean you won't still be able to get Asus branded boards for Intel processors(which are my personal choice in boards and what I am running in my home PC right now). So basically, to all of us, it means absolutely nothing.
I'd guess that Asus is just running out of manufacturing capacity between all the side ventures they're getting into(Laptops, handhelds, etc) and the fact that they have to make both the Asus and Asrock branded motherboards. With all of that, the space probably wasn't worth setting aside for Intel, least, not at the rates that Intel was paying them.