Foswiki tip: How to hide web at the left pane
Rename the web to hide it from left pane. Say the directory is ZAdminTest, rename the folder to zAdminTest
Access it using: http://host/foswiki/bin/view/Main/ZAdminTest/WebHome
I am not sure if this works on *nix system though..
This can be done by using the "Set NOSEARCHALL = on" option in the WebPreferences of the web you wish to hide. Not sure that it's also hidden from the AdminGroup.
Or view access could be limited too by using the webs access controlls in the WebPreferences, if this is appliciable for you.