Get it here: http://aka.ms/w8maps
So many of you developers with Windows 8 applications with maps were waiting with baited breath. Now you no longer have to wait! You can rebuild your app in RTM bits and submit to the store to be there for GA!I
Visual Basic, C# and C++ Developers: See Getting Started with Windows Store apps.
Important note for Visual Basic, C# and C++ Developers: For your Windows Store app project to work correctly, make sure you complete the steps in Add Bing Maps to a Windows Store app after you install the SDK.