The scoop on Herbert Allen's annual Sun Valley, ID retreat for business and entertainment tycoons

Traditionally, investor Herbert Allen’s annual Sun Valley (Idaho) retreat for 150 business and entertainment tycoons is shrouded in secrecy. This year, however, while taking in such atypical sights as Barry Diller cycling around a pond, we gleaned a few tidbits from the four-day July schmoozathon:

· Most powerful moguls: The well-displayed breasts of Playboy‘s 1997 Playmate of the Year, Victoria Silvstedt, who was invited by Allen & Co. for the festivities. When the chaperoned Silvstedt — in a low-cut micromini — got up to dance in the packed Sun Valley Lodge bar, even billionaire Oracle of Omaha Warren Buffett froze mid-sentence and stared.

· Cheeriest ex-honcho: Mike Ovitz. The former Disney prez — currently exiled from the corridors of power — could have canceled. Instead, he happily sipped Perrier with pals like Nike CEO Phil Knight before bolting for Italy — just an hour before the taking of the traditional group portrait of VIPs.

· Most-heard war cry: ”I am Tiger Woods!” which was chanted by several participants in the July 10 golf tournament.

· Couture of choice: Standard-issue navy blue Allen & Co. sweaters, tied — preppy-geek style — over the shoulder.

· Most popular pastime: Watching Sonja Henie in 1941’s Sun Valley Serenade, which plays on TV in the hotel’s rooms 24 hours a day. Said one venture capitalist, ”It’s better than My Best Friend’s Wedding.”