This little Director goodie is done by Andries Odendaal (from Wireframe fame) for Getty Images as part of their "10 ways to interact" campaign. More innovation to be found at https://interact10ways.com
Other notable features:
Hosted Browser Environment ( a sandbox so to say )
Browser History Management
Async RPC Calls
From my 5 minute review, the Toolkit comes with extended documentation including a 'Getting Started' guide to get you up and running quickly, an Internet Explorer control, class references and a commandline utility to create Eclipse projects.
Instead of 'forcing' the developer to learn yet-another-UI-language ( XAML/MXML/XUL ) it let's you stay in Java to write UI code. Whether or not that is the best approach is something i won't go into.