How to interpret accelerometer output data? I'm running my accelerometer through my Arduino mini and outputting my values using the following values 

 // print the sensor values:
  Serial.print(analogRead(xpin));
  // print a tab between values:
  Serial.print("\t");
  Serial.print(analogRead(ypin));
  // print a tab between values:
  Serial.print("\t");
  Serial.print(analogRead(zpin));
  Serial.println();
  // delay before next reading:
  delay(100);


Here's an example.



The x,y,z values that are outputted are quite high even the arduino is not moving. I'm new to Arduino programming and would love some understanding on how to convert these x,y,z to an Acceleration value ie. Is the arduino moving or not?
The accelerometer will output a specific number of volts (or millivolts) per g.  You need to find that information in the datasheet for your accelerometer.

Then you need to take the readings you make through analogRead() and convert them to a voltage. Then that voltage can be used, combined with the value you found above, to determine the g reading.