To import Maya information from Maya to After Effects.
Be sure to set the frame rate to be identical to the After Effects Scene file.
Camera1 seems to work and I am sure the basic names work but no perspective & orthographic cameras.
To bake camera animation go to Edit -> Keys -> Bake Simulation and make sure the camera is not under any group nodes. If not use the constraint keys and bake the new camera.
Nulls can be named NULL, null or Null.
Upon export, select on the camera and relevant nulls that are to be used and export that as a .ma file.
Maya 2010, After Effects CS5