The game controller for the Amazon Fire TV is now on backorder. New orders are now expected to ship on April 24. Amazon is noting the delay as being "due to popular demand." It's also limited the number of controllers you can buy at one time to nine, which isn't really a limit for more normal folks.
For more on the Fire TV, be sure to read Andrew Martonik's first impressions of the device, including the game controller.
Are you planning on getting a game controller with your Fire TV?
To get on the controller waiting list, hit up Amazon.