Ed - please give us some time with this. Our priority right now is getting Aerofly out of early access. There will be an announcement very soon regarding a couple more goodies as well. We do understand that a good tutorial for AC3D users is necessary and I give my word that you will get one.
Ray - as I mentioned a couple of times here already, users will be able to submit their work once we finalize the tools available to everyone. Some work that's being done currently may need to be redone or reconverted once the tools are finished. This is why i'm holding back at the moment releasing user created work related to cultivation.