I just thought about writing a GWT app that just works as a client for a RESTful web service. The web service requires HTTP basic authentication for each call.
Since the client is not 'connected' with the server over a session, I have to remember the authentication credentials on the client side. I could do this within the GWT application, but with this, the client has to log in after every reload, which is not very beautiful. I also don't think it's a good idea to write this information to cookies, since everyone could read them.
So, who knows what I am looking for? :-)