The Ultimate IMU is one of our most popular products - it combines an ITG-3200 gyro, ADXL345 accelerometer, and an HMC-5843 magnetometer in a single package. It also has a GPS header, MicroSD socket, and an XBee header. Control is provided through an LPC2148 processor with plenty of extra memory for custom code development. It's a great platform for a number of applications.
We get quite a few questions about how to use the Ultimate IMU (and how to integrate it with XBee), so in SparkFun fashion, we've created a beginner video tutorial to help you along the way. Check it out:
We hope this video helps you get started with the quite useful Ultimate IMU. If you have additional questions you can (as always) contact tech support or leave a question in the comments here or on the IMU page - we'll do our best to get you going! Cheers!