PreacherTom writes: Growing strife inside Yahoo! has erupted into a sweeping management and organizational shakeup. CEO Terry Semel announced yesterday that the company will be reordered into three groups: one to focus on advertisers and publishers, another to focus on Yahoo!'s base of over 500 million users, and a third on technology and development. While Semel denies layoffs are in the future, there will be replacements in the upper echelon for the world's most popular website. The changes, the most extensive at Yahoo in more than five years, cap months of speculation about how it would respond to slowing sales growth, a slumping stock price, and a steady stream of executive departures in the past year.