Windows Phone toolkit for WP8 already exists

The project has been moved to http://phone.codeplex.com/. after several months and the sdkofficial version, the project will be updated.

What's new
Refactored project to support Windows Phone 7.1, 8.0 and more with maximum code sharing.
WP8 map API extensions, including modern pushpin Control
Longlistmultiselector control, including Grid view multiselect.
Control themes updated to match WP8 UI
Large number of RTL bugs fixed now that RTL is a fully supported feature in WP8
25 + bugs fixed
Contains all the fixes, improvements and new controls that were part of the September 2012 release, you can read more about that here: Windows Phone toolkit-September 2012 release
Removed longlistselector as it's now part of the SDK
Removed tuple. CS
Removed performanceprogressbar (though we are taking the suggestion that we shocould add it back as a descendent of progressbar for backcompat)
Removed gesturelistener