Check out this interview with Beverly Cleary in The Oregonian. You do have to register to read beyond the first page, but it's just zip/age/gender.
Most of it talks about her life and reflects on why Ramona Quimby and Henry Huggins beat the tar out of--uh, I mean, were so different from the Dicks and Janes that came before. It does mention that she's retired and doesn't write anymore, which . . . sigh. I've never been quite able to understand how someone can retire from writing, anymore than they can retire from breathing. But considering how hard Cleary worked for so many years (Henry Huggins was written in 1950, Ramona's World in 1999, and she did all sorts of school visits and things during that time) she's entitled to her quiet retirement.
And she was a librarian! Cool!