NEW YORK - Doers and doings in business, entertainment and technology: Flash: Newspaper reports baseless rumor? Readers are wondering if the New York Post has done it again. On Wednesday, the News Corp. tabloid reported that Sirius Satellite Radio and XM Satellite Radio were beginning the dance of merger negotiations. But the Post, every Gothamite's guilty pleasure, has a colorful history of shooting from the hip: Last year, the newssheet, famed for its "Headless Body in Topless Bar" front page, became a darling of eBay shoppers when it declared that presidential candidate John Kerry would pick Dick Gephardt as his...