Necrons were removed from the Games Workshop site a couple of weeks ago, and it was great news. A reader here, dan, pointed out that he was looking in the Necron section last night for more signs of Necrons incoming, and saw that all the models that were gone are now back up on the standard selection pages. He was right!
So, to make it brief, yes, Necron models are back up on the GW site. At least here in the United States. Here is the link.