Hey
I have started with Netbeans but moved to Ecplise, because it is more stable and much faster with Scala. Here is the link:
http://scala-ide.org/That said, if Netbeans plugin improved I would gladly moved back.
The last stable netbeans plugin I can find is here:
http://plugins.netbeans.org/plugin/38999/nbscala-2-9-x-0-9.
Also you will need Scala 2.9.2 to successfully compile the project. It may work with 2.9.1 but there are no guarantees.
Cheers,
Lex