Thanks to the snow and the resulting closure of the school, we now have status info for our lab printers. With all that free time friday, I started pulling snmp data from the printers, allowing us to monitor any aspect of them we want. Obviously, the most important to us is the toner and paper levels. The newer LaserJet 2300's are advanced enough to monitor the toner level, however the older LJ4050 and 5m are not.
edit: turns out that the 4050's do monitor toner levels (w00t)
The hardest part in all this is deciphering the snmp data. AFAIK, there is no standard or guide to specify what the value in say... mib-18.104.22.168.22.214.171.124 is, so I have to sift through all the values and try to correlate them to get the info I want.
I've got toner level graphs working, but I'm still gathering data to figure out paper levels. I have the keys indicating cartridge capacity, but the current level still eludes me.
If I can get access to our testing server I really want to start logging paper usage in the labs. Graphs of that data would be very very sweet.