So I've been trying to get IDEA 12.0 to work with Play 2.1.0 and Scala 2.10.0. I've just about given up because it's not working for me the way I want it to. Here is a copy of my build.properties, Build.scala, and plugins.sbt. I followed the approach on the playframework site to execute idea with-sources=yes in the play console. I've also tried adding sbt-idea plugin version 1.3.0-SNAPSHOT as seen in plugins.sbt, but nothing seems to work if I want to reference a new view template I just created or a new route. The only way I can work in IDEA is if I have a console open and run sbt compile, go back to IDEA, and it will refresh itself and recognize the new view templates or routes.
plugins.sbt
logLevel := Level.Warn
scalaVersion := "2.10.0"
// The Typesafe repository 
resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/"
// Sonatype snapshots to get sbt-idea 1.3.0-SNAPSHOT
//resolvers += "Sonatype snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/"
// Use the Play sbt plugin for Play projects
addSbtPlugin("play" % "sbt-plugin" % "2.1.0")
//addSbtPlugin("com.github.mpeltonen" % "sbt-idea" % "1.3.0-SNAPSHOT")
build.properties
sbt.version=0.12.2
Build.scala
import sbt._
import Keys._
import play.Project._
object ApplicationBuild extends Build {
  val appName         = "admin-application"
  val appVersion      = "1.0-SNAPSHOT"
  val appDependencies = Seq(
    // Add your project dependencies here,
    jdbc,
    anorm
  )
  val main = play.Project(appName, appVersion, appDependencies).settings(
    // Add your own project settings here      
  )
}