After nearly a year with two mapping platforms running in parallel, Google announced today that Google Maps V3 had graduated from Google Code Labs to become the primary maps API. Previously the newer version was recommended for mobile applications, the original reason behind the platform rewrite. With V3's graduation, V2 becomes deprecated, but will continue to work for now.
DeepEarth, a new map control that integrates Microsoft's Virtual Earth mapping service (our Virtual Earth API Profile) with the Silverlight 2.0 framework, is now available as an open source project on CodePlex.
Google added a new layer to its own mapping application to show transit routes in the 400+ cities where it has data. The result is an easy way to see nearby bus and train stops on the web or on some mobile phones. Unfortunately, neither the data nor the imagery is available in the API version of Google Maps.