Появился плагин IntelliScala 0.1 для IntelliJ Idea 6

http://www.nabble.com/IntelliScala-plugin-released-tf3327681.html#a9252707

• syntax highlighting
  
• formatting
  
• parsing errors highlighting
  
• folding
  
• surround with
  
• file structure outline
  
• keyword completion
  
• goto class
  
• compilation (with no dependent files calculation yet)
  
• debugging
  
• cross-language resolve of types/find
  
• usages/rename of classes and traits

Плагин http://plugins.intellij.net/plugin/?id=1347
Трекер http://www.jetbrains.net/jira/browse/scl