The BMA180 looked ideal with good sensitivity etc. but I was wondering why the Bosch accelerometer page only had a flyer and no data sheet.

The device has been discontinued so I need to do further research. I think the Kionix KXCJ9 or Freescale MMA8451 are worth a look

Also considering an integrated Gyroscope + Accelerometers device like the InvenSense MPU 6000 series and only using the accelerometers.