Hello,
This is a great post about IMU's. Lots of good information. I am also working with Gyro's and accelerometers in my Quadrotor project. I needed a simple tool to visualize data and ended up writing one. Although there are ways to plot data using Processing, I wanted a stand alone tool.
Here is link to relevant thread. Hope you guys find the tool useful.
http://arduino.cc/forum/index.php/topic,58911.0.html
I will probably change the tools to accept float data in the next version.
Cheers