Here's something to chew on: You don't need a blockbuster product to build a dynamic, successful company.Take the Wm. Wrigley Jr. Company ( WWY). Chewing gum isn't exactly a high-profile category; innovation in the candy industry doesn't prompt the same gushing headlines as tech toys like the iPhone or Wii game system. But Wrigley has been so successful within its niche that it drew attention from some major players. This week, global candy manufacturer Mars joined with investor Warren Buffett to buy Wrigley for $23 billion, creating the world's largest confectionary company. The deal was impressive enough to goad two of the other big candy companies -- U.K.-based Cadbury Schweppes ( CSG) and Hershey ( HSY) -- into merger talks of their own, so don't be surprised if another major candy deal is announced soon.