Traversing the Graph via queries

I have been building a number of custom object types and enjoying the ease-of-creation of the layout and relations. Whole graph trees are easy to populate.

Question: This may already be in the knowledge base (though I could not find it if it is), but is there a desire to build out a query interface to traverse the graph? “Show me all actors who acted with other actors who acted with the actor Kevin Bacon” sort of thing?