@Eric C i'm in the same boat, case ready ince march 31 and still no interview scheduled, we've sent tones of emails with no response, i tried to call the consulate no response either, we are lost in this process, have you heard anything menwhile?
btw, a week ago i received a notification by USCIS that a document has been sent and would arrive by june 23 but nothing came. Don't know what that document is.