PCBook

This is a block which links to a pcbook server and shows how many of your computers are free or busy.
Configuration
In the plugin configuration provide the URL to your PCBook server, eg.
http://server1.example.com/pcbook
To only show the status of workstations whose names match a given string,
enter that in the pattern option, eg. ‘room1-‘ will match machines with names
‘room1-1’, ‘room1-2’, etc.
PCBook is available from http://valis.co.uk/pcbook