Windows Phone developers have a nifty tool calledÂ Windows Phone GPS Emulator for developing location based apps. This emulator seems to broken for now and it may be because of the Bing Maps services used in it. Yesterday, Bing Maps team announced about the update on improved infrastructure for spatial data services and I guess that may be causing some problems. Anyway, Microsoft is aware of this issue and working on it. So, any developer who is facing white blank screen for maps in Windows Phone Emulator, keep in mind that you are not alone.
Thanks to Peter for the heads up.