Good news, Scala 2.8 has been released.
I updated the github repo for the code examples for my book Practical Semantic Web and Linked Data Applications. Java, Scala, Clojure, and JRuby Edition (links for free PDF download and print book purchase).
I haven't had the opportunity to do very much coding in Scala for several months because the company I have been working for (CompassLabs) is mostly a Clojure and Java shop. That said, Scala is a great language it is good to see the final release of 2.8 with the new collections library and other changes.