conq writes "BusinessWeek has a piece on Microsoft's latest announcements that it is going after large-business computing, a realm that IBM currently has a stronghold on." From the article: "In both cases, the company has fashioned 'enterprise' versions of the products with additional security and collaboration-enabling features for sale to large businesses. Microsoft has spent $20 billion over the past three years on these upgrades, and Ballmer says it will spend $500 million over the next year marketing them to corporations. 'We're unlocking the next wave of growth for Microsoft,' Ballmer predicted during a press conference after his speech." We've previously discussed Microsoft's plans for IBM.