I'm taking a look at Netbeans 6.0 with the new Scala plugin (http://blogtrader.org/page/dcaoyuan/entry/first_experimental_scala_supporting_for).  When I tried to build a HelloScala app, I received the error "Could not load definitions from resource scala/tools/ant/antlib.xml."

Setting SCALA_HOME in my environment variables appears to not work with Windows Netbeans 6.0 final and the Scala plugin.