Alan O’Leary shows in his blog a WebView integration in Swing. It is a not well documented feature, the integration of JavaFX 2.0 controls into a Swing application. But integration is the main goal for the JavaFX 2.0 release.
As an enthusiastic NetBeans Platform developer and JavaFX partner, I've worked over the last two days to marry JavaFX 2.0 and a NetBeans Platform Application. And yes, it works:
Read all the details of how to achieve the above here.