Google taps legal muscle for Microsoft case.In its fight with Microsoft over an executive’s defection, Google has enlisted attorneys from a small but high-powered law firm. Kekar & Van Nest, a 50-lawyer firm based in San Francisco, represented Grokster in its legal battle over file sharing, and also represented Wall Street banker Frank Quattrone and former Enron leader Andrew Fastow in criminal cases. The firm specialises in “complex civil and criminal litigation,” according to its Web site, and was judged “litigation boutique of the year” earlier this year by The American Lawyer trade publication.Court filings made public on Wednesday show Google requested that five attorneys from Kekar & Van Nest join its legal team. The requests, filed August 16, were approved by the court. For more on this visit here.