Confirmed now at:
Vancouver, Wa - both stores
Hillsboro, Or
Tigard, Or
Santa Cruz, Ca
So it's spreading. Costco usually starts new products out in Seattle (Kirkland) area, then spreads out from there, so the further you guys are from Costco's home, the longer it may take to get it there, but it might be worth asking someone in charge at the store, and mention the west coast is getting them.
Good luck, so far everything I've seen and people I've talked to are impressed with the quality they are seeing, hopefully taste will be as good.