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Sometimes, we can learn from our mistakes. During the height of the dot com bubble, investors kept plowing money into tech stocks, hoping for ever greater returns. For many years, companies obliged, beating revenue and earnings expectations. Eventually, in early 2000 when the economy began to lose...

AT&T (T) CEO Randall Stephenson said his company may have missed an opportunity with Amazon's (AMZN) Kindle book reader. Instead the company will provide wireless access for Plastic Logic's ebook reader. "I'm an avid Kindle user," Stephenson said at the Fortune Brainstorm Tech conference in...