Ubuntu 9.10, codenamed Karmic Koala, was officially released last month. In a comprehensive review, Ars takes you under the surface for an in-depth look at the new features and major architectural changes. The wiki crops up in many companies’ internal discussions about process improvements and efficient collaboration, but it is often shot down because so few people have exposure to good models of what a really successful business wiki can do.

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Week in tech: good karma for koalas, not so good for pirates