T ech companies aren't hippies tinkering in their garages anymore. Sure, the entrepreneurial spirit may still be there, but tech is big business these days, and growing bigger every day. Good ideas are ruthlessly hunted down and snatched up by venture capitalists, and start-ups are bought out by larger competitors. Silicon Valley has turned from a hipster refuge for quirky nerds into the home of some of the world's biggest and most aggressive corporations. And the titanic flood of money into the industry isn't just making a few tech entrepreneurs stunningly rich; it is transforming the regional economy...