I've just started working with Scala and I'm starting to see more interest in the financial arena.
I'm now getting more people/colleagues showing interest in this. A number of people have asked me to keep them posted as to my progress. I didn't see the same level of interest in Groovy (or other JVM languages post Java itself).
So it's definitely the Java language de jour, and I think it has more momentum than anything before it in the Java arena. How this carries forward is anyone's guess, however!