Unity Build Scene bundle

//From http://blogs.floriancavallo.fr/post/2012/07/28/Unity-Ajout-dynamique-delements-Partie-I-Asset-Bundle.aspx
[@MenuItem("Assets/Build AssetBundles From Scene")]
    static void BuildAssetBundle()
    {
        string assetPath = AssetDatabase.GetAssetPath(Selection.activeObject);

        //make sure user has a scene selected:
        if (Selection.objects.Length != 1 || !assetPath.Contains(".unity"))
        {
            EditorUtility.DisplayDialog("Scene Asset Bundle Creation", "Please select a single scene in your project.", "OK");
            return;
        }

        //set a save location for the bundle:
        string savePath = EditorUtility.SaveFilePanel("Save Scene Asset Bundle", "", "", "unity3d");
        if (savePath == "")
        {
            return;
        }

        //save asset bundles for iphone and android:
        string[] pathPieces = savePath.Split('.');

        BuildPipeline.BuildStreamedSceneAssetBundle(new string[] { assetPath }, pathPieces[0] + "." +pathPieces[1], BuildTarget.WebPlayer);

        //complete:
        EditorApplication.Beep();
        EditorUtility.DisplayDialog("Scene Asset Bundle Creation", "Done!", "OK");
    }