BUMPED into rose-lapelled Richard Finny, the Sheraton's PR and promotions director, yesterday. And my oh my, what a filthy mood he was in. (So what's new, did I hear someone mutter at the back?) Apparently Richard had been awoken from his slumbers three times during the night by uncaring hacks from Fleet Street tabloids wanting details of his plan to bring Fergie, Duchess of Pork, to speak at the Sheraton Luncheon Club. The story itself is old hat here. But somehow or other it appeared on Fleet Street news lists last weekend and the wires between London and Hongkong started scorching. Growled Richard: ''The reporters who called me wanted to know when Fergie was coming here and what she was going to talk about. I told them that at this stage nothing had been finalised apart from the fact that she has agreed to come. ''Fleet Street seems to be particularly keen to know how many hangers-on she will be bringing with her. I told them that Fergie was free to bring who she likes, but we will probably foot the bill for her secretary and her bodyguard.'' But I'm sure Richard would draw the line at her financial adviser. Incidentally, if I may make my own suggestion for a topic for Fergie's speech, how about: ''Around the world in 80 days - without paying''?