I've been programming in Scala a lot lately and I continue to be impressed with the enormous amount of thought and care that went into the language and its libraries. If you're a Java programmer that's interested in making a move into a more productive language, you've got to give Scala a try. Odersky and his team have done an amazing job of maintaining the best of the Java experience while moving the state of the art in JVM programming forward by leaps and bounds.
There's a significant amount of new material to learn when moving to Scala, but as you develop a feel for the bigger Scala picture you'll begin to realize that it's simpler than Java itself in some fundamental ways. I won't try to convey the Scala landscape in this short post. Instead, I suggest this presentation I found over the weekend.
Check out slides 76 and 77 for a dramatic illustration of how concise things can be in Scala.