This seems the most appropriate place to ask a GWT question. I've just started to use GWT and am planning an application which will have several JSP pages. My question is: do GWT apps typically have one entry point? If so, it seems as though navigating from "page" to page amounts to switching panels in the GWT code. Which means there will be one URL and that a back button would not function properly. Am I on the right track? Thanks.
Having worked with GWT for all of one afternoon, I'd say the answer to your questions is "yes".
One fix may be to have the entry page of your app redirect to a second page that actually displays the app. That way if someone tried to "back" out of the app, they'd get the page that redirects and get dumped right back in the app.
Working in GWT is basically using AJAX throughout, but you can easily switch between JSP pages as well as use GWT's history framework to change the state of your web applications. Once you have an understanding of how to use GWT history then your web app will come together. Here is a link on GWT history: GWTTutorials.com