I started developing a driver for the Absolute IMU and a test program to check its function.
Usage : The driver has 4 inner classes (one for each sensor : accelerometer, tilt sensor, gyroscope and compass). Simply create those that your model supports to start reading its values. The testprogram shows all values from the 4 sub-sensors. It shows the actual values on the screen of the brick and shows a chart on the PC for historic data. Before starting you will need to setup a bluetooth connection on the PC to your brick. Then run the program on the brick, start 'nxjchartinglogger.bat' (in the bin subfolder of the LEJOS program) and connect to your brick from nxjchartinglogger. This should start showing 10 lines with the data. Now shake your IMU and the charts should go bezerk.
You can download everything here : http://my.rapidshare.com/BlueHaze/17095
Let me know if you have any issues with it or made enhancements to the driver.