You want to know where you are in space? The Pololu MinIMU-9 does it all - an L3G4200D 3-axis gyro and an LSM303DLM 3-axis accelerometer and 3-axis magnetometer onto a tiny 0.9″ × 0.6″ board.
The DE-ACCM2G is an off the shelf 2 axis 2g accelerometer solution with analog outputs and integrated op amp buffers.
Curious just how strong the gravitational forces are today? Check out this 3 Axis Accelerometer for your latest project.
This is the breakout board for the IDG500 Gyro, which includes an on-board 2.8V regulator and all pins broken out to 0.1" pin holes.
Looking for Phidgets 3-axis Accelerometers? We've got them. Order them from Solarbotics, because if you don't, we'll scare your cat (just a little).