We have been experimenting with foundationless frames and getting the bees to create their own foundation.
The problem with doing this on brood frames is that the bees tend to create more drone comb and we would rather their build this in our drone management frames. So we can keep varroa numbers lower.
When we use foundation less frames in the honey supers the bees tend to create more drone sized cells for the honey, which uses less nectar in producing the wax for the comb.
We still use wooden frames with wax foundation here at Kiwimana, our bees don't like the plastic frames and neither do we :).
But I think we will stick to using full foundation frames for the brood and give the bees some “Drone management frames” to fulfil their desire for drone space. What do you do with your foundation? Have you moved over to using plastic?