Miles,
I think that Creo View is not able to show datum geometry hidden inside native Creo files.
You have to configure Creo properly and export (ie. Save As) native Creo file as PVZ file. When you open PVZ file in Creo View, you will see datum geometry.
Configuration:
---
Locate export_pvs.rcp file in your Creo installation.
The path is similar to ... CREO3_LOADPOINT\Creo 3.0\M010\Common Files\text\prodview\export_pvs.rcp
Add the following lines at the end of this file:
adapter/outputDatumPlane=1
adapter/outputDatumCurve=1
adapter/outputDatumPoint=1
adapter/outputDatumAxis=1
Martin Hanak