The MPU-9150 is a new sensor, so you won't find many examples of it right now.
Do you have the Sparkfun breakout board ? https://www.sparkfun.com/products/11486
That board is for 3.3V only. Connect it like this: Arduino Uno <-> Sparkfun MPU-9150 breakout board GND <-> GND 3.3V <-> VCC A4 <-> SDA A5 <-> SCL 2 <-> INT Don't connect the other pins of the Sparkfun breakout board.
Run the i2c scanner, http://playground.arduino.cc/Main/I2cScanner
After that, use the code to interface the MPU-9150. The link by Sparkfun is a copy of the code by Jeff Rowberg. You better use his (newest) code from his website, http://www.i2cdevlib.com/ His code uses the interrupt, that is why pin 2 (=interrupt.0) of the Arduino Uno is used.