The Metropolitan Opera should release the Der Rosenkavalier production from 2010 on DVD.  It is a wonderful production starring Renée Fleming, Susan Graham, Christine Schäfer, and Kristinn Sigmundsson.  It was streamed in HD into theaters, and it is available for viewing on the MetOpera Player.  However, it is not available on DVD, and it is a wonderful production and even people without access to the MetOpera Player should be able to enjoy the production.