Hi Jon,
The only Cisco supported Attendant Console for CME that I know of is Arc Express. Have a look;
Call Manager Express Compatibility
Arc Express 1.3 passed Cisco IVT (Interoperability Verification Testing) against Call Manager Express 3.3 in March 2006
Arc Enterprise is a feature-rich attendant console application for Cisco Unified CallManager. Arc Express is a scalable, modular application for Cisco Unified CallManager Express. Arc Enterprise and Arc Express are now available worldwide through the Cisco price list to customers and all Cisco IP Communications Specialized Partners.
From this link;
http://www.arcsolutions.com/solutionsplus/
Here is the data sheet;
http://www.arcsolutions.com/Downloads/SolutionsPlus/Arc%20Express%20Data%20sheet%20-%20Cisco.doc
Hope this helps!
Rob