Windows Phone 7: Microsoft Antes Up in Smartphone Race

Microsoft's CEO Steve Ballmer officially launched the Windows Phone 7 mobile operating system Monday and announced nine new phones and partnerships with wireless carriers. It's a landmark moment for Microsoft that needs to prove its Windows-centric phones, with links to Microsoft Office, Xbox Live, and a nascent library of apps, can woo the masses away from Apple, Android, and BlackBerry-based phones. The first handsets with the new OS will be available November 8, said Ballmer.