Andy,
I just got a note form International Metrology Systems describing an intent to merge with a Company called Newport and Ram Optical. In this note they describe how they will be able to offer a Virtual Dmis Interface to the Faro Arm. This may something to consider. I don't know if this is an actual product or not.
Check the link at http://biz.yahoo.com/bw/000626/ca_newport.html
Bob Connors
Lawrence Berkeley National Lab