Here is the first attempt at 3D printing a balancing robot. Need to get this boy running (balancing)..
MPU 6050 looks like a good option for gyro - http://www.i2cdevlib.com/devices/mpu6050#source
Cost just $3 on ebay (from China)
Let me know if anyone wants to STL files to 3D print this. Havent put it up on git yet as its still a work in progress.
I can't wait to see it run. Mentioning the STL files reminds me, how about putting the current Logo STL files up on github? I'm sure some people would want to create a Turtle lid.
More information on libraries and 'hello world' examples for working with the sensors can be found in this post.