Pumped to use Microsoft's upcoming Surface and Windows Phone 8 devices to help you bolster your gamerscore? Sit tight -- SmartGlass development starts now. Microsoft is now making the Xbox SmartGlass Software Development Kit available to partners with agreements to develop content for the Xbox 360. Approved developers can download the SDK from the Microsoft Game Developer Network, replete with a SmartGlass JavaScript library, the Xbox SmartGlass Studio and a sample application. Redmond hopes the