waderoush writes: An Xconomy column today suggests that Google is getting too big. When the company was younger, most of its acquisitions related to its core businesses of search, advertising, network infrastructure, and communications. More recently, it’s been colonizing areas with a less obvious connection to search, such as travel, social networking, productivity, logistics, energy, robotics, and — with the acquisition this week of Nest Labs — home sensor networks and automation. A Google acquisition can obviously mean a big payoff for startup founders and their investors, but as the company grows by accretion it may actually be slowing innovation in Silicon Valley (since teams inside the Googleplex, with its endless fountain of AdWords revenue, can stop worrying about making money or meeting market needs). And by infiltrating so many corners of consumers’ lives — and collecting personal and behavioral data as it goes — it’s becoming an all-encompassing presence, and making itself ever more attractive as a target for marketers, data thieves, and government snoops. ‘Any sufficiently advanced search, communications, and sensing infrastructure is indistinguishable from Big Brother,’ the column argues.