the actual arduino software has a sketch that will do exactly that:
File->Sketchbook->Examples->Sensors->ADXL3xx
reading data from an accelerometer and sends it back to the pc over serial. if you want to do that with wireless communication you have to ask someone else ^^
if you want to work with the data you can look here: Arduino Playground - InterfacingWithSoftware
or look at the examples here: Serial - Arduino Reference