Associated Press Via azcentral.com Apr. 19, 2007 SEATTLE - With a growing crowd of millions lining up for its fancy coffee drinks in the 1990s, Starbucks Corp. was tantalized by seemingly endless opportunities to expand its brand. A chain of full-service restaurants? Seems like a good fit. A hip tavern with coffee undertones? Hey, sounds sexy. A literary magazine? Why not! It didn't take long for those ventures to fall flat. And as the coffeehouse titan readies for a long-term explosion of growth, some Starbucks-watchers warn the company may again be stretching its all-important brand too far. Even company chairman Howard Schultz frets that the efficiency improvements driving Starbucks' dominance have robbed stores of their authenticity. Starbucks' leaders say they haven't forgotten the past. Reminders of their greatest misses are even scattered around global headquarters. "We do look in the mirror and say, ... Hey, don't forget when that didn't work,"...