In a prelude to the battles we will see in 2006 when Longhorn, er, Windows Vista is released, Microsoft has sued Google to prevent one of its former employees from helping the search engine giant. Google hired Kai-Fu Lee, a former Microsoft executive, to lead its strategy in China - the same role he had played at Microsoft. King County Superior Court Judge Steven Gonzalez sided with Microsoft's claim that such a relationship would lead to an unfair transmission of proprietary information and granted a temporary restraining order barring Lee from working at Google on "any product, service or project similar to those he worked on at Microsoft, including Internet and desktop searching technology."
Stay tuned, it's going to get dirtier moving forward.