scala sbt 10 multi module project

build.sbt

//contents of plugins/build.sbt

resolvers += "Web plugin repo" at "http://siasia.github.com/maven2"

//Following means libraryDependencies += "com.github.siasia" %% "xsbt-web-plugin" % "0.1.1-<sbt version>""
libraryDependencies <+= sbtVersion(v => "com.github.siasia" %% "xsbt-web-plugin" % ("0.1.0-"+v))

SlogBuild.scala

import sbt._
import Keys._
import sbt.Package._
import java.util.jar.Attributes.Name._
import com.github.siasia.WebPlugin._

//unashamed copy of scalaz's build
object SlogBuild extends Build {

  override lazy val settings = super.settings :+
        (shellPrompt := { s => Project.extract(s).currentProject.id + "> " })

  lazy val standardSettings = Defaults.defaultSettings ++ Seq(
    organization := "org.purang.slog",
    version := "0.3.6",
    scalaVersion := "2.9.0-1",
    libraryDependencies ++= Seq("org.scalatest" %% "scalatest" % "1.6.1" % "test" withSources()),
    resolvers += ScalaToolsSnapshots,
    //publishSetting,
    //credentialsSetting,
    scalacOptions ++= Seq("-encoding", "UTF-8", "-deprecation", "-unchecked"),
    javacOptions ++= Seq("-Xlint:unchecked")
 )

  lazy val slog = Project(
    id = "slog",
    base = file("."),
    settings = standardSettings,
    aggregate = Seq(domain, client, server)
  ) dependsOn(domain, client)

  lazy val domain = Project(
    id = "slog-domain",
    base = file("domain"),
    settings = standardSettings ++ Seq(
      libraryDependencies ++=  Seq(LiftJsonDependencies.liftJson)
    )
  )

  lazy val client = Project(
    id = "slog-client",
    base = file("client"),
    settings = standardSettings ++ Seq (
      libraryDependencies ++= Seq(LiftJsonDependencies.liftJson, JerseyDependencies.jerseyCore, JerseyDependencies.jerseyClient)
    )
  ) dependsOn(domain)

  lazy val server = Project(
    id = "slog-server",
    base = file("server"),
    settings = standardSettings ++ webSettings ++ Seq(
      libraryDependencies ++=  Seq(RiaksDependencies.riaks, LiftJsonDependencies.liftJsonScalaz) ++ ScalatraDependencies.deps ++ jettyDependencies
    ) ++ Seq(resolvers ++= Seq(ScalatraDependencies.sonatypeNexusSnapshots))// TODO ++ Seq(deployTask(deployDirectory))
  ) dependsOn(domain)

  object RiaksDependencies {
    lazy val riaks = "org.purang.storage" % "riaks_2.9.0" % "0.3.1" //withSources()
  }
  object LiftJsonDependencies {
    lazy val liftJson = "net.liftweb" %% "lift-json" % "2.4-M3"
    lazy val liftJsonScalaz = "net.liftweb" %% "lift-json-scalaz" % "2.4-M3"
  }
  object JerseyDependencies {
    lazy val jerseyVersion = "1.6"
    lazy val jerseyCore= "com.sun.jersey" % "jersey-core" % jerseyVersion
    lazy val jerseyClient= "com.sun.jersey" % "jersey-client" % jerseyVersion
  }

  object ScalatraDependencies {
    lazy val deps = Seq(scalatra, scalate, scalateJruby, scalamd, scalatrascalatest, slf4jBinding)
    lazy val scalatraVersion = "2.0.0-SNAPSHOT"
    lazy val scalatra = "org.scalatra" %% "scalatra" % scalatraVersion
    lazy val scalate = "org.scalatra" %% "scalatra-scalate" % scalatraVersion
    lazy val scalateJruby = "org.fusesource.scalate" % "scalate-jruby" % "1.5.1"
    lazy val scalamd = "org.fusesource.scalamd" % "scalamd" % "1.5"
    //lazy val servletApi = "org.mortbay.jetty" % "servlet-api" % "2.5-20081211" % "provided"

    // Alternatively, you could use scalatra-specs
    lazy val scalatrascalatest = "org.scalatra" %% "scalatra-scalatest" % scalatraVersion % "test"

    // Pick your favorite slf4j binding
    lazy val slf4jBinding = "ch.qos.logback" % "logback-classic" % "0.9.29" % "runtime"

    lazy val sonatypeNexusSnapshots = "Sonatype Nexus Snapshots" at "http://oss.sonatype.org/content/repositories/snapshots"
    // For Scalate
    lazy val fuseSourceSnapshots = "FuseSource Snapshot Repository" at "http://repo.fusesource.com/nexus/content/repositories/snapshots"

  }

  lazy val jettyDependencies = Seq("javax.servlet" % "servlet-api" % "2.5" % "provided", "org.eclipse.jetty" % "jetty-webapp" % "7.3.0.v20110203" % "jetty")
}

Would be great if I could deploy to an external jetty/tomcat using a custom deploy task. A google search didn't bring up any candidates, so when time permits write it.