It seems that Atari wants to make use of the success of the iCade gaming cabinet with its own joystick controller for the iPad.Atari has recently updated their Atari's Greatest Hits iOS app to to support the not-yet-announced Atari Arcade Duo Powered joystick.
The gaming accessory has a slot for the iPad, a joystick and several buttons to control the arcade games made popular by Atari. Similar to the iCade, the device may use a bluetooth connection to communicate with the tablet.
The design may allow landscape and portrait orientation. The game controller is advertised , but there is no any news about the price .