The 9DOF Sensor stick is a very small (only 11x37mm in size) sensor board with 9 degrees of freedom. It includes the ADXL345 accelerometer, the HMC5883L magnetometer, and the ITG-3200 gyro. The ‘stick’ has a simple I2C interface and a mounting hole for attaching it to your project. Also, the board is a mere 0.036″ thick (0.093″ overall), allowing it to be easily mounted in just about any application.
Not the cheapest?
Let us know, we will try to beat it!