Apple announced that The Pixel Farm is going to support export to Motion, and I would imagine that SynthEyes will follow suit. The Maxon folks have supported some Motion integration in the past, so I wouldn't be surprised if they added camera export to Motion.
One thing to keep in mind is that Motion projects are straightforward XML, so it wouldn't be much work to write a script to convert Maya cameras to Motion cameras and vice versa.
The important part was being able to import data from PFtrack and cinema 4D. I have footage with camera dolly and wanted to translate the camera data to the text in motion. And then applying a filter effect only to the text triggered by audio behaviour. Again great ino.
Bal Deo http://www.st-life.com