PS2 Controller (v4) PS2 Robot Controller (v4)
This 2.4ghz wireless RF Play Station 2 style controller works perfectly with BotBoarduino or Arduino equipped robots. The controller has a range of around 10 meters, more when used outdoors. Two analog joysticks and 16 buttons available for robot control. The receiver adapter is included as well as mounting hardware and cables. 
Model Number: RC-01 v4
Price: $26.24 

RadioLink AT9S 9CH Controller RadioLink AT9S 9CH Controller
  • Suited for all airplanes including helicopters
  • Takes 3ms only for 9 channels to respond in parallel
  • Supports signal strength and voltage monitoring
  • Vibrating alarm can be used in noisy environments
Model Number: AT9S
Price: $129.99 

Bluetooth Bee Bluetooth Bee
The Bluetooth Bee is a complete Bluetooth 2.0 module (complete with onboard antenna) whose pinout is compatible with that of an XBEE module. This module is intended to be used with the SSC-32U servo controller for wireless servo control
Model Number: RB-Tys-01
Price: $19.95 

PS2 Controller Cable Kit PS2 Controller Cable Kit

With two analog joysticks and 16 buttons the PS2 controller makes a great robot controller. This is an ultra-lightweight do-it-yourself cable kit to make it easy to connect the game controller to your favorite microcontroller. PS2 receiver not included.
Model Number: PS2DIY-KT
Price: $5.44
 On Sale For: $3.96 

PS2 Receiver Carrier PS2 Receiver Carrier

The PS2 Receiver Carrier allows you to mount a Lynxmotion PS2 receiver above other Lynxmotion electronics such as the BotBoarduino. The kit includes all the hardware needed as well as four tapping screws which replace the four existing screws on the PS2 receiver. Slots in the Lexan allow the board to be used with other electronics. Receiver not included.

Note: This is compatible with V1 and  V2 receivers (not all receivers are compatible)
Model Number: EC-03
Price: $8.74
 On Sale For: $0.17