1) The document discusses Microsoft's move from marketing-driven releases with big upfront promises to a more agile approach with technical previews and incorporating customer feedback. 2) It describes the Hotmail Mobile team, which developed the mobile app in 1 year with a team of 6 people. 3) While the team adopted some agile practices like daily stand-ups and code reviews, legacy architecture made test-driven development and continuous integration challenging, and planning occurred over longer 3-month milestones rather than 2-week sprints.