Arduino Duemilanove IO Expansion Shield:
The Arduino Duemilanove IO Expansion Shield gives you a easy way to connect device such as sensors, servo and RS485 device. It is compatible with official Arduino Duemilanove products including Atmega128 or Atmega 328 version.
6 Analog input (3Pin) with Power, GND and Signal
6 PWM output (3Pin) with Powe, GND and signal
Independent servo power input
RS485 output which is unique in the market
APC wireless sockets which you can easily make your roboduino wireless ready