The VoiceBox Shield can be mounted on top of your Arduino board to
give it access to all of the capabilities of the SpeakJet voice and
sound synthesizer. The Voice Box Shield uses the SpeakJet chip to
convert serial commands into a great robot-sounding voice.
Populated on the VoiceBox Shield are the SpeakJet IC, a two stage
audio amplifier with a potentiometer to set the gain and a standard
3.5mm audio output jack. Simply connect a speaker to the output jack
and get your Arduino-bot talking with very minimal work!
You can control the SpeakJet through either its serial line, or the
eight event input lines which are connected to digital pins 5-12. A
3-way jumper allows you to connect either the software (D2) or
hardware (D1) TX pin of the Arduino to the SpeakJet's serial input.
Also included on the shield are a grid of 0.1" pitch through-holes
for prototyping as well as the Arduino's reset button. Header are
normally not included, but at Play-Zone, you get two Pairs of 8-Pin
and 6-Pin Arduino Stackable Headerse for free with this shield!
* Listen to the SpeakJet!  (YouTube)
* Talking Wireless Server Tutorial 
* Tutorial on adding the TTS256 text to speech IC to the shield
* Listen in MP3 Format as the VoiceBox Shield introduces itself