The Google API Library for GWT team is asking for feedback as they have just added initial support for the Google Maps and Google AJAX search APIs.

This email is to let you know about a milestone build that we’ve produced to get your feedback on the API and see how well it works for your needs. This is not intended to be used for production, there may be breaking API changes before a true release and please report any bugs over on the issue tracker.

The milestone builds are available here:
http://gwt-google-apis.googlecode.com/files/gwt-google-apis-r41.zip
http://gwt-google-apis.googlecode.com/files/gwt-google-apis-r41.tar.gz

And a couple of demos can be found here:
http://gwt.google.com/samples/AJAXSearch/AJAXSearch.html
http://gwt.google.com/samples/HelloMaps/HelloMaps.html