AirDrop appeared in Finder with the original Dev Preview. When I upgraded to Developer Preview 2, AirDrop was gone. I figured it was some sort of bug, and when I did the Dev Preview 2 Update that was released today, I figured it would return - but I was wrong! Any idea on how to bring AirDrop back into the Favorites area of the Finder sidebar?? It's not even an option in the Finder Preferences Sidebar section!