The Java Posse just released a round table discussion about GWT, which I was able to take part in. The other participants were Bruce Johnson of Google, and Ryan Dewsbury of Gpokr.com. I have been following the Java Posse coverage of GWT since the announcement of GWT at Java One, so it was nice to be able to add my own thoughts to the discussion.
In my opinion there are two important points that came out of the discussion:
2. GWT is only five months old. It has a few 3rd party libraries available, like the GWT Widget Library, several frameworks, numerous GWT specific editor plug-ins, a PDF book, and a couple paper books in the works. With this amount of support behind GWT it should have a pretty good future ahead of it.
So, if you are still deciding if you should invest the time into GWT, check out the podcast. Maybe it will provide some answers that you have been looking for.