ABC and CBS are discouraging their stars from appearing on comedian Jay Leno's NBC prime-time talk show. The rival networks are hoping to stop Leno's 10 p.m. program from undercutting viewership of their costly dramas as they are trying to build audiences. The boycott reveals an unintended consequence of NBC's decision to move the veteran late-night comedian; it is now harder for Leno to book some TV stars that could boost his ratings. Leno mentioned the boycott Tuesday when Julia Louis-Dreyfus became the first CBS actor to appear on his new show. Louis-Dreyfus acknowledged that she faced some …

Goodby L.A. Times, hello Bloomberg. The Washington Post and Bloomberg News have struck a wide-ranging partnership that includes a joint news service, a combined online page of business news and the transmission of Post stories on Bloomberg's financial terminals. It is a more ambitious alliance than The Post's news service with the Los Angeles Times, which will be ending soon after 47 years. Called the Washington Post News Service with Bloomberg News, the new service will compete among the existing 600 subscribers with the McClatchy-Tribune service, which will now include Los Angeles Times stories. For the …