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

BJAX - A Quick Hack for Using GWT with Bookmarklets.

Cypal Studio for GWT - a set of plugins for Eclipse to ease GWT development.

Patch to make GWT Server Library to work with GWT 1.4 final

GWT RPC Screencast - Quick tutorial on how to use GWT RPC in Eclipse.

Mastermind game for iPhone - written in GWT.