As Harish mentioned earlier, the Virtual Earth Platform recently launched the first version of the Virtual Earth Web Services - a set of Web services that allow you to add mapping and search functionality to your application, including location finding, map imagery, and routing capabilities.
For example, you can:
Over the course of the next few weeks, various members of the Virtual Earth Platform will be writing in detail about the Virtual Earth Web Services.
Eugene Shinn
Senior Software Development Engineer, Virtual Earth Platform