That's the red board from the 2009 Kit of Parts.
http://usfirst.org/uploadedFiles/200...r%20Manual.pdf has a picture if you want to make sure.
The accelerometer is an ADXL335. From the sensor manual: "The ADXL335 can measure +/-3g in each axis. Nominal output is 1.5V at 0g (free-fall), plus 300mV/g."