Here are the top 10 posts of the Official Google Blog in the year 2009 by unique pageviews. Introducing the Google Chrome OS - 2,591,794 unique pageviews (more than 12 percent of the year's total). The announcement of our open source operating system received more than 4x the views of any other post. Went Walkabout. Brought back Google Wave - 639,225. Wave-mania struck after we introduced a new product for collaboration and communication at our Google I/O conference. Here comes Google Voice - 357,084. We released a preview of this application to help you better manage your voice communications. "This site may harm your computer" on every search result?!?! - 320,435. A short-lived error affecting Google search results led to confusion and concern; this post cleared it up. Email in Indian languages - 224,052. A transliteration feature in Gmail that makes it easier to type in Indian languages was a hit. More than one million readers of the blog in 2009 were f...