I've added a few small additions to the sources (i.e., not in the binary yet):
First, there are new file templates specifically for Vaadin:
For example, simply by adding "SimpleAddressBook" (which adds one Java file to your source structure), you end up with an address book that includes a search feature in your web application:
Secondly, when you press Alt-Insert, you have a new code generator, named "Vaadin Button":
Press the "Vaadin Button" menu item and you have a new button, together with the implementing class added to the class signature, with a hint in the left sidebar for generating the abstract method that is invoked when the button is pushed:
Most importantly, now that these features have been added to the sources, someone else (e.g., from the Vaadin team) can take those sources and add MORE file templates and code generators to the plugin.