I'm learning Scala as a first JVM language, and it is definitely great to be able to access so many Java libraries so seamlessly (Mina, Apache commons, Hadoop,

I'm learning Scala as a first JVM language, and it is definitely great to be able to access so many Java libraries so seamlessly (Mina, Apache commons, Hadoop, ...), all the Scala syntax/type inference goodness just works and in some cases make the libraries significantly nicer to use in Scala than in Java (IMO).