Ray - thanks for posting the class. It looks like a very complete implementation of the CIM API. I had already implemented my own version, which is less complete, but perhaps a bit lighter weight. I think it gets the job done for the purpose of integrating CIM with Ubercart, but I welcome any suggestions for improvement.

All - the first version of the Authorize.net CIM is now available in contributions:

http://www.ubercart.org/contrib/2537

Thanks in advance for helping to test and providing feedback. Ubercart rocks.

Best,
Chad