Microsoft CEO Steve Ballmer will be in New York on Nov. 30 to introduce major upgrades to three of Microsoft's flagship products: the Windows Vista operating system, Office 2007 application suite, and Exchange Server 2007 e-mail system. In advance of that announcement, Ballmer talked with InformationWeek editor John Foley about the significance of the product launch to Microsoft's business customers. We also asked about Microsoft's plan for continuing to develop innovative products amid fundamental changes in how software is delivered and accessed.