All is true!
No details on U.S. release or much of anything else, but the Beam 6 grain bourbon is a real item. The six grains are: corn (i.e. maize), malted barley, rye, wheat, triticale (a rye/wheat hybrid), and brown rice.
Watch this space for more info!
UPDATE: Check out the Chuck Cowdery blog for more info and reflections.