Exadel is doing quite a lot with JavaFX. Here is quick summary.
Exadel JavaFX Studio plug-in for Eclipse. A set of plug-ins for Eclipse to help build and deploy JavaFX applications. Plug-in information and download. The plug-in is free.
Flamingo RIA framework
Integrates JavaFX with enterprise back. In particular, allows easily to connect JavaFX with Seam and Spring. Features include server-side push and off-line applications (occasionally connected applications). Flamingo information and download. Flamingo is free and open source (LGPL).
Our thoughts on enterprise JavaFX.