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 SDK will give developers a head start on building applications for the technology before it launches later this year. Of course, if you can't wait to see what developers are cooking up, you can always just check out our hands-on again.