Kiri Te Kanawa has said in a British television interview that she will retire from the opera stage. She's currently giving a cameo as the Duchess of Crackentorp in Donizetti's La Fille du Regiment at Covent Garden--and the staging has been massaged to give her an aria (from Puccini's Edgar, since you ask, as the Duchess is written as a speaking role). And that, she expects, will be it as far as the opera stage goes.