Jon Udell - Like a moth to the Freebase flame:

"I created my first user-defined Freebase type. Because the system is so new, there are some quite fundamental things that (so far as I can see) haven’t yet been defined. I wanted to create entries for some of my personal projects, such as LibraryLookup and elmcity.info, so I created a type called Project and added the properties Goal and Collaborators. That enabled me to add entries for my two personal projects, describe their goals, and associate myself with them as a collaborator."