We are getting very close to releasing the beta of ROS Hydro Medusa.  As I announced yesterday we have made it up to 408 packages already released into Hydro.  We are waiting to make sure that we can get the new versions of pcl, gazebo, navigation, and tf2 integrated into the Beta before releasing it for testing.  We want to make sure that we have these new versions so that during our longer release cycle we can keep better stability without pressure to upgrade these packages. 

For more fine grained updates you can see the open tickets tracked on github at: https://github.com/ros/rosdistro/issues?milestone=8&page=1&state=open

Tully