We are packing up the house to move and I brought it up again. "Hey, the diapers would make great packing material!" We have dozens of flats (and some prefolds, fitteds and FB that we have bad luck washing and mess with the 9 month old's skin - they're all being stripped and passed on) that are going to cushion our breakables. Hurray!
The compromise is that we will have two dozen pairs of non-waterproof trainers and half a dozen waterproof covers for when DP takes them out alone.
So far today we've had a wet and the start of a poo for each boy. Not bad at all.