I might have mixed up some things, but...didn't we already knew that Canon would open…
Rumor: Canon EOS-1D C Firmware Update Screenshot
It appears that the firmware update for the Canon EOS-1D C is field-tested (beta tested) by selected photographers. The source that sent me the picture above told me that the firmware update for the EOS-1D C is set to be released immediately after NAB 2013.
The EOS-1D C is sold for $11,999 at the following shops: B&H and Adorama, and you can rent it here.