In an interview with Reuters at this years E3 Harrison said:
"There is no guarantee that we are not going to have 'out-of-stocks' this holiday season. If you see one, buy it. Don't assume that you can come back later and find one" said Harrison.
"We're trying to figure out what's the reasonable monthly level, and as we've seen every time we ship product to the market, whether it's in Japan or here in the U.S. or in Europe, it sells out in a matter of days."
Ironically - retailers are only just starting to have regular supplies to stock. Expect them to be depleted come the run up to Christmas.