I wrote a series of posts on how to connect JavaFX to a server running with Seam framework. Client-server communication is realized with the help of Flamingo framework. Here is the complete series:

• Calling Seam component from JavaFX
• Invoking Hibernate Validator from JavaFX
• Binding to server-side context variable from JavaFX
• Using Expression Language (EL) in JavaFX to communicate with server
• Seam conversations from JavaFX