The situation: I have a 580EX on a lightstand and am firing it with Cybersync triggers. The transmitter is mounted on a 5D Mark II.
Because the camera is unaware of the transmitter, there's not a way to tell it to trigger on 2nd curtain. You can set the flash to 2nd curtain, but that doesn't do anything since the trigger just tells it when to fire.
Is there a way to accomplish a 2nd curtain fire with a setup like this? I'm trying to avoid buying $500+ worth of Radiopoppers.