Update: GameStop – Pokemon GO Plus pre-orders live on Amazon
Update (6/20): Bumped to the top. Now up for pre-order on GameStop.
Update 4: Sold out again.
Update 3 (6/16): Back up on Amazon again.
Update 2: Sold out.
Update: Bumped to the top. This sold out for a period on Amazon, but is now back up.
Original (6/15): Amazon is now taking pre-orders for the Pokemon GO Plus accessory for Pokemon GO. Place an order here.