JavaFX - Quick and Easy
Angela Caicedo presented an excellent set of slides on a crash course in JavaFX programming at Sun Tech Days 2009-2010 in Brazil. You can find the slides here:
Not only does it explain what you can do with JavaFX, but it goes over the JavaFX Script language, its syntax, how it works with Java, and how you use it to quickly build visually appealing and interactive applications in Java.
Of course, when you're ready to move on to more advanced JavaFX programming, take a look at my book: