Right now the LEGO Store has the MINDSTORMS 10 Year Anniversary Exclusive: The Black NXT Limited Edition in stock. It's in limited quantity and on sale to boot! Normally $169.99 you can pick it up for only $122.98.
The NXT intelligent Brick includes:
* 32-bit ARM7 microprocessor.
* Support for Bluetooth wireless communication.
* 1 USB 2.0 port.
* 4 input ports.
* 3 output ports.
* Powered by 6 AA (1.5v) Batteries, not included, or lithium Rechargeable Battery (#9798), sold separately.
* Up to three NXT Bricks can be connected at the same time; however, you can only communicate with one NXT Brick at a time.
* This is the individual component, and does not include any sensors, motors, cords, software or other accessories.