Demi Moore's diamond ring, a present from beau Bruce Willis, does not mean the two will be getting vertical down the aisle. It's just a friendship ring, not an engagement ring, according to Willis' spokesman, Paul Bloch. "Bruce says if anything, they're going steady," adds Bloch.

Daryl Hannah does not think things go better with Coke. The actress was watching TV when, to her surprise, she saw a Diet Coke commercial flashing several of her scenes from Roxanne, last summer's hit with Steve Martin. Outraged at the unauthorized use of her likeness, Hannah went to Columbia Pictures (which is owned by Coca-Cola Co.) and talked legal action. Columbia paid Hannah a six-figure settlement (Daryl is donating the money to charity) and issued a formal apology—but not until four months later. Still not satisfied, Daryl had her production assistant ring L.A. media to make sure they'd received Columbia's statement. Says Hannah: "I get extremely disappointed and offended when I see a performer that I respect trying to sell me a product. Why can't they use their celebrity for something that has meaning to society?" And besides, she prefers fruit juice. Two years ago St. Elsewhere's promiscuous Dr. Bobby Caldwell (Mark Harmon) left the hospital after contracting AIDS from a female prostitute. On the Jan. 13 episode, Dr. Ehrlich (Ed Begley Jr.) will announce Caldwell's death to the St. Eligius staff, saying Caldwell died in a California hospice at the age of 36 after dwindling to 95 lbs.

Miniseries director Jerry (Shogun) London makes his big screen debut with Rent-a-Cop, due in January. London says leading man Burt Reynolds, who has directed four movies himself, offered plenty of directorial advice. "Reynolds leveled with me from the beginning," says London. "He told me, 'If I have an idea, I'll tell you.' " Reynolds' ideas? Hire old friend and former co-star Liza (Lucky Lady) Minnelli as his love interest, sharpen the jokes and shoot a montage showing Burt wandering alone at night through Chicago's streets. Consider it done. Last time a director didn't heed Reynolds—Dick Richards in 1985 while shooting Heat—the star allegedly punched him out, at least so claims the $24 million suit Richards has still pending against Reynolds.

With the wave of old television shows returning as TV movies, it's no surprise that Hawaiian Eye is rolling in again. Robert Conrad and Connie Stevens are planning a two-hour TV movie, with Conrad returning as a private detective, Tom Lopaka, and Stevens as night club singer Cricket Blake. Filming will be in Oahu this time rather than on the Warner Bros, back lot. And Conrad will bring in a few more sand dollars than the $315 a week he was paid when the show first appeared in 1959.

Hotel Hell: Eddie Murphy left his heart and a slew of hotel keys all over San Francisco when he played the Oakland Coliseum. Murphy's first stop was S.F.'s Four Seasons Clift hotel. Not for long. The superstar's suite didn't suit him so he promptly checked out but picked up the tab for his $675-a-night pad and .his entourage's 19 other rooms. Next stop: the Mark Hopkins, where the two double beds in Murphy's room amused him. "What's this? The Ricky Ricardo Special?" said Murphy. "I want something more Hollywood, man. You know, with chandeliers." Moving on, Eddie tried to check into the Nikko's $1,200-a-night Imperial Suite, with two bedrooms and sauna. No vacancy. Murphy's final resting place: the Ramada Renaissance, where he found a pastel apartment to his liking. Said one employee: "He wanted a suite that had some style to it. The guy doesn't worry about money." Murphy's tab for two nights' food and lodging came to $20,000—without chandeliers.