Because of the new file structure of GWT 1.6 the Cypal Eclipse plugin doesn’t work properly any more. Since you want at least a bit of comfort while developing, you have to use Googles Eclipse plugin. But that plugin is everything else than a stroke of genius…
If you want to create a new project, you get a complete GWT example project that demonstrates how to use GWT. This might be fine for the first look at GWT, but its annoying to clean that up every time you create a new project.
While Cypal had some functionality to create RPC services with just one click – including interface, async-handler and the actual implementation – the Google plugin doesn’t offer any help at all. You have to write everything by your one, even the changes in web.xml.
We can only hope, that Google will add these functionalities soon, or Cypal will getcompatible to GWT 1.6.