Fawn Hall has finally decided that she is ready for her turn in the media spotlight. The former National Security Council secretary and part-time model, who for months successfully maintained her privacy, has agreed to a one-on-one with Barbara Walters.

Hall's intention to chart the celebrity course became known when she signed an exclusive contract with the William Morris Agency. Ron Yatter, senior vice president of the Beverly Hills-based agency, said at the time that Hall is also likely to be the subject of a book and film deal.

Maurie Perl, a spokeswoman for Walters, said Hall has placed no restrictions on the interview, which is expected to air Sept. 15.

Joan Rivers, Back to Work Joan Rivers says she hopes keeping busy will help her deal with the loss of her husband Edgar Rosenberg, who died Aug. 14 of an overdose of Valium and alcohol. Rivers told People magazine that she'll resume work Sept. 20 as a presenter at the Emmy Awards and that she still has 18 months left on her contract with Caesars Palace in Las Vegas. She said she also plans some guest appearances on "Hollywood Squares."

"I don't want a warm hand on my shoulder," Rivers said in the interview. "I don't want sympathy audiences." Rivers, 54, said her husband's problems began with a 1984 heart attack that left him depressed and affected his stamina and memory.

Hospital Report Actor Lorne Greene was listed in fair condition yesterday at Saint John's Hospital in Santa Monica, Calif. where he is recovering from abdominal surgery for a perforated ulcer. The 72-year-old Greene, who starred as patriarch Ben Cartwright on television's "Bonanza," was operated on Wednesday.

Valens Scholarship Established A music scholarship for young Hispanics has been established in the name of Ritchie Valens, whose brief rock 'n' roll career is portrayed in the summer hit film "La Bamba."

"Dreams can come true -- Ritchie proved that," said actor Lou Diamond Phillips -- who portrayed Valens in the film -- in announcing the scholarship before an audience of several hundred people in Los Angeles Sunday. "You have to believe in yourselves and have faith in God."

Valens' mother Connie Valenzuela told the crowd in Spanish that she was glad to see people benefiting from her son's life.

Valens, who had two enormous hits with "Donna" and "La Bamba" in a career that lasted little more than a year, died in 1959 at age 17 in a plane crash that also killed singers Buddy Holly and J.P. Richardson, who was known professionally as the Big Bopper. The Ritchie Valens Music Scholarship will support young Hispanics who wish to pursue a college music education.

Jarvik's Affair of the Heart One could almost say that Sunday's wedding ceremony in New York was a union of heart and mind. This time it was artificial heart inventor Dr. Robert Jarvik and Marilyn vos Savant, who is listed in the Guinness Book of World Records as having an IQ of 230, believed the highest score for a woman.

Science fiction writer Isaac Asimov, who gave the bride away, said of the union: "If you have two people like that, it's very logical ... a meeting of the minds, so to speak." Another guest waiting in the reception line put it this way: "I thought maybe they were going to give us a pop quiz."

Jarvik made the wedding rings himself out of gold and pyrolytic carbon, the same material used to make the valves in the artificial heart.

Vos Savant, 40, a writer based in New York, met Jarvik, 41, a year ago. She has told interviewers that she ignored Jarvik's invitations to dinner until she ran across a photograph of the doctor bare-chested. The couple is expected to spend their honeymoon in Paris this September.