I'm sorry if I missed this, but what will happen to the Freebase software? I always found that to be a strong asset, but Wikidata's is less than stellar. They only mention the data and APIs here.
@markbao -- I did get Cayley out the door (http://github.com/google/cayley) which has many many parallels to Freebase's graph database, loading and storing Freebase data (as well as whatever other graph data). I've been a little busy with other bits of life at the moment, but totally open for contributions!
@markbao, I echo your concerns. Behaviour is just as important as data. In many modern systems, a lot of the behaviour is tied up in the user interface.
