High quality 10DOF IMU (9DOF+baro) provided by Innovworks
Product link: http://www.diymulticopter.com/category.php?id_category=6
This IMU communicates with Arduino via I2C. Compatible with all the drone codes who can use an I2C IMU.
BMA180 + ITG3200/3205 gives a very good experience with MultiWii. HMC5883 and BMP085 are used to complete the full degree 10DOF IMU.
High quality 6DOF IMU from Innovworks
BMA180 + ITG3200/3205 gives perfectly the stabilization for multicopters.