MAC OS 10.8 (Mountain Lion) USERS:Mac OS 10.8 is not officially supported on the VPN system (sslconnect.johnshopkins.edu), but it does work.
You should now have a window open that lists the servers to which you have access via WebDAV. In the folders should be the sites to which you have access. This connection will remain active until you “eject” the “drive” created. In Mac OS Tiger this network share will be a blue sphere inside a box. On Mac OS Leopard, the network share will appear as a drive icon similar to USB or Firewire drive icons.