In an deployed application you only need to place the gwt-servlet
class on the server's classpath, and only then if you are using RPC
etc; the gwt-user class is not needed once you have compiled your
code. (several versions ago the classes for RPC were only in the gwt-
user jar so if you search this group you might find old messages
telling you to put gwt-user.jar on your server, but that is no longer
the case).
HTH!
//Adam