title: Switch from Bing map to Google map
body: <p>I am developing an application using Bing map on Silverlight.
  Recently, I've been asked how much time I need to switch to or support Google Maps, too.</p>
  
  <p>I know <a href="http://www.mapstraction.com/" rel="nofollow">Mapstraction</a> could be a way to do it. But how difficult/time consuming this migration could be? I didn't find any testimonial on this.</p>
  
  <p>Is there any alternative? Ideally, the application should support both maps.</p>
  
  <p>Later Edit: Of course, the solution should be cross platform and cross browser :)</p>