If you follow Microsoft Virtual Earth I’m sure you’ve picked up some blog posts that posted some of the features for this release, but those posts mysteriously disappeared. Information leaked out and you wondered, "Was that real?" Well, finally the definitive source on the new Virtual Earth Web Service and the new Virtual Earth Map Control 6.2 I deliver to you. If you want to skip the descriptor and just get coding you’ll be happy to know the Virtual Earth AJAX Control SDK on MSDN, as well as, the Virtual Earth AJAX Control SDK on MSDN, as well as, the Virtual Earth Interactive SDK have both been updated.
Users can now build mobile applications with Virtual Earth, which offers more features and enhancements to support mobile platforms such as, Windows Mobile, RIM Blackberry and Apple iPhone. Rich imagery creates immersive mobile end-user experiences that bring location-based information to life.

Source: MSDN Blogs