I work at a Best Buy in New Jersey that started selling them today as well. Beastly looking router. I've been scouring the net for any reviews or even just more details on the specs but haven't had much luck finding anything.. yet.
Edit: Oh and our system shows it's supposed to be out on the 20th, so only 5 days early.
I work at Best Buy in Missouri and checked RSS when we got them in on truck. It said the street date was June 6th so I don't know if the system had it wrong and it was corrected but I would assume thats why some stores have them out and some don't.
I saw it, got excited then checked the date and put them out. I just bought my Nighthawk at the end of June, will wait to see if worth it to exchange after reviews out I guess!