Hi Darren,
the product data sheet is available here:
http://www.cisco.com/en/US/products/ps6713/index.html
As far as I understand it there is a TAPI connection for the server and the clients connect via XML, I hardly see any Terminal Services or Thin client support on this.
If you have a specific business case I would suggest contacting your local Cisco Sales rep to ge tthe product manager involved on the discussion.
Regards,
Riccardo