I was an avid user of JavaFX 1 (1.0 to 1.3), but I haven't tried JavaFX 2 yet, partly because it is beta, partly because the long wait douched my enthusiasm, partly because there is now lot of stuff to re-learn and mostly because I just lack time...
I am still hesitant to invest time there... from a personal point of view; enterprise usage is a very different matter. The strong commitment for a big enterprise (Oracle) add weight to this technology. Well, if I should do JavaFX for work, I would be happy to dive again. ^_^ Even better if it is with Scala! :-D