Interested in developing your web service on Bing Maps?? Perhaps if you take the interactive Bing Maps SDK for a test spin you might change your mind. this app enables you to test drive the SDK, browsing all the functionality that is provided to the developer in order to create compelling, interactive web maps and services. See http://www.microsoft.com/maps/isdk/ajax. The Interactive SDK offers hands-on, task-based demonstrations of features available in the version 6.3 API release, complete with code samples and links back to the reference SDK. Interested in AJAX? IF so then Bing Maps is also providing a useful document titled Getting Started with the Bing Maps AJAX Control which will walk you through everything you need to know to get started. More useful information on the Bing MAps AJAX Control (6.3) is now up in this blog post. A tip.. see also Bing maps on Wikipedia