Mirror Coincidence: Yoko Ono

What is it with Yoko Ono? I saw her name referenced on two different tv shows (ignored it). Then there was an article about the top magazine covers... some pic of her and john Lennon (rolling stone?) was named as the top cover. Then I heard on the radio today that she's selling some envelope on which John Lennon scribbled "Give peace a chance" for $250,000. I'm trying to ignore these. Why the sudden interest in her? Why is everyone talking about her?