Has anything at all been done with Shadow Westcrown? I'm still trying to work out how Paizo is using the Plane of Shadows, but presumably this is a perfect situation to showcase that particular transitive plane. My players are already asking questions, so even if Paizo has been mum I'm going to have to work this out.
Any suggestions would be welcome.
I don't think there has been anything done with Shadow Westcrown. However, if you want ideas about how Paizo is using the Plane of Shadows you might want to check out the Pathfinder Society Scenario #2-11: The Penumbral Accords and/or the Pathfinder Module: The Midnight Mirror
Good luck and have fun!