The 2006 season from Washington National Opera finally opened Saturday night with an opera that I was thrilled to see and hear live, Béla Bartók’s A Kékszakállú herceg vára (Duke Bluebeard’s Castle, premiered at the Budapest Opera in 1918). The Ambassador of Hungary, András Simonyi — fresh from a hilarious appearance on the Colbert Report — was so happy that he helped host the opening night WNO gala in honor of the 50th anniversary of…