Bing today released a new Bing Maps SDK for Metro style apps, which provides a set of controls to help you integrate mapping into your Windows Metro style apps.
This release also support building apps using C#, C++, or Visual Basic. As part of the SDK, the first beta release of a new native map control, written in C++, is available, allowing developers to use C#, C++, or Visual Basic and XAML to consume Bing Maps data.
Along with the new controls, Bing also announced a new licensing model for the pre-release versions of Windows 8, providing you much more flexibility in developing and testing Metro style apps on the Consumer Preview.
In order to take advantage of this special license, you must use a "Metro style apps (BETA)" key, which is available here.
You can use the following links to get started with this new SDK: