Apparently, there is a new Pokémon Center kiosk in the South Hill Mall in Puyallup, Washington. I heard a rumor, and sure enough, there it is on the mall's official store map (it's not in the online directory yet).
EDIT: There's also a new kiosk in the Westfield Southcenter Mall in Tukwila, Washington, according to
ambertdd.
Here is a map of the three FOUR(!) kiosks that are currently open:
For those who are unfamiliar with western Washington, the Tacoma and Puyallup kiosks are only about 14 miles apart! Puyallup is about 45 miles from Northgate.
The kiosks were manufactured by
Dillon Works of Mukilteo, Washington, which is also in the Seattle area.
Finally, in my search for additional new kiosks, I found a LinkedIn profile for a TPCi retail manager who posted this on his page: "We have opened Pokemon Center kiosks in 3 Seattle area malls since Sept '10. The plan is an expansion of the concept with a wide distribution of Pokemon merchandise, as well as entertainment choices geared to appeal to existing and new Pokemon enthusiasts. The product line includes plush Pokedolls, trading card games, DVD's and DS games, figures and apparel. These are the 1st Pokemon run stores outside Japan."
FYI, TPCi is located in Bellevue, and Nintendo of America is in Redmond (but I don't think NOA has much to do with the kiosks).
My fingers are crossed for Spokane. Eastern Washington gets no love. D: