what happened to the Acer w510?

The Acer w510 is the Windows 8 tablet I have been waiting for. It comes with clover trail so it runs full windows 8. Its thin and light (comparable to iPad 2 size and weight). And most of all, it was going to be only $499.99. What happened to this thing? Why is it not on sale? Anyone hear anything? I decided to return my surface in favor of the w510 because I refer the option of full windows 8. But it looks like that isn't an option anymore. Did Acer announce any delays?