http://www.washingtonpost.com/wp-dyn/content/article/2007/01/12/AR2007011201896.html American Idol extends talent search to songwriters By Brian Garrity Reuters Friday, January 12, 2007; 8:07 PM NEW YORK (Billboard) - It's hard to imagine that the producers of "American Idol" would want to tinker with the show's formula following last season. After all, the hit reality program -- a talent