To make the transition from Java to Scala easier, you might want to keep some of the existing Java frameworks your company have experience in using. At least that is our theory when we chose to keep SpringMVC as web framework in my current Scala project. Time will tell if we are right or wrong in that theory :)
A nice little side effect is that Scala could make Spring Java configuration go from cool to great. This video shows how a Spring configuration could look in Scala, and how we could use Scala’s features to create very readable and type safe Spring configuration.
Video Producer: JavaZone Conference