Hi Margaret, this is Brandy again :-). I do this too, although I'm not co-sleeping, so I pop it in her mouth when she starts popping off the boob at night. I haven't had any success with the PPO, as instead of slowing down, my dd starts popping off. I know EP suggests not using the pacifier, but it's what's working right now, so we're going with it. It works pretty well, sometimes we have to go in and replace it mid-sleep-cycle, but even that's getting better, she's starting to be able to find it herself. I think if it works, keep using it!
Brandy