Launching Objects in Gazebo with ROS Fuerte

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So I've been able to load objects in the past by using the following example code,

<!-- Blue Bar Cylinder -->
<model:physical name="cyl_model">
    <xyz>.6 0.4 1</xyz>
    <rpy>0 0 0</rpy>
    <static>true</static> 
    <body:cylinder name="cyl_body">
      <xyz>0 0 0</xyz>
      <rpy>0 90 90</rpy>
      <geom:cylinder name="cyl_geom">
        <xyz>0 0 0</xyz>
        <size>0 0</size>           
        <mass>1</mass>
        <visual>
          <size>0.03 0.03 .2</size>
          <material>Gazebo/Blue</material>
          <mesh>unit_cylinder</mesh>
        </visual>
      </geom:cylinder>
    </body:cylinder>
  </model:physical>

Although now this doesn't work with ROS fuerte... I also tried the example in the Gazebo tutorials http://ros.org/wiki/simulator_gazebo/Tutorials/SpawningObjectInSimulation

What am I missing here? I'm not sure what has changed with loading objects into the gazebo simulator.