Campfire has a pretty nifty API that allows to query many room attributes. Below script can be used to detect if a person is not logged in. Each of our team member has the below script cronned in their machines to run every 10mins or so to get alerted when they have been logged out. below are the attributes you need to substitute
{authcode here} - To get your auth code in Campfire go to "Edit my Campfire account" or "My Info" at the top screen in Campfire and there you will see your auth code. This is a secret code and should not be shared with others so be watchful and ensure the below script only has read/execute perms for the member user on the box.
"#{id}" - To get the room ID simply login to Campfire and click on the room. The browser url should show the room ID.
{member name} - Should be the same as the name specified when creating campfire account
#!/bin/bash
curl -s -u {authcode here}:X "https://{your specific domain}.campfirenow.com/room/#{id}.xml" > /tmp/campfire-room.xml
present=`grep "{member name} " /tmp/campfire-room.xml | wc -l`
if [ $present -eq 0 ]
then
`/usr/local/bin/growlnotify --name "Not Logged In Campfire" -s --message "You are not logged into campfire.
This might reflect in your performance review next year so you better login now :)"`
fi