On way to provide the “continue later” functionality is to use a tool that saves your web browser’s form state. Lazarus: Form Recovery is one of those tools for Firefox that constantly saves the state of your web forms and allows you to load previous content when you return to a website. This works very well with Google Docs Forms. You can interrupt filling out the form at any time, return later and restore the information you previously entered with a few clicks.

• a custom number of stars in one row (horizontal)
• a mouse hover effect
• provides an RPC service interface to store and retrieve rating data
• client side usage without a service is possible
• ui customization via CSS is possible

Some features that are missing:

• client side usage needs a listener when the rating has changed.
• the progress indicator is not customizable (image url in the java source).
• it’s not as elegant or efficient as e.g. this CSS based star rating.
• no keyboard support like the rate it widget in the gwt components library.

Nevertheless I believe this is pretty usable and maybe I’ll submit the widget to the GWT Widget Library Project if it is welcome. Anyway, feel free to use it but I won’t promise any further support – we’ll see. Here is the sourcecode of the StarRating widget.