Working with the JavaFX 2.0 early access release, I've had quite a bit of success. I've recently converted a JavaFX 1.3.1 custom control to JavaFX 2.0. Here is the screen shot showing the old control on the left, and the new shiny JavaFX 2.0 version on the right.
This work is for a client, so I can't post the code to show the differences. However, I am working on something more generic to post here soon. Stay tuned!