In his planned talk at QCon  London, scheduled for Wednesday 11th March 2009 , according to his abstract , Jonas Bonér will give an introduction to Scala from a Java/JEE and real-world perspective. He will discuss a wide range of areas such as: How to make effective use of Scala's richer OO abstractions and type system, such as mixin composition, to create more flexible and reusable components and systems. How to take advantage of Scala's FP nature, such as closures, high-order functions, immutability, for more clean, safe, conceptually coherent and deterministic code. How to make concurrent programming and event-driven systems a walk in the park using Scala's Actors library. How to bring it all together and make Scala work in the real world; with problems like Web development, O/R Mapping, Dependency Injection (DI), AOP, Testing, High-Availability, Scale-Out.
His complete abstract can be found here .