FYI
I've posted a new export on the Zabbix Wiki
templates page. It is for monitoring the temperature of Dell servers running OpenManage and the Windows SNMP service. This is especially handy for administrators that have machines mounted in the top portion of colo cages. Some of our machines are 25 C warmer than our average just because of where they are located in the datacenter. It's also interesting to watch corporate hardware get warmer over the weekend when the building is running on limited climate control.
I'm currently monitoring temperature mostly on Dell PowerEdge 1850, 1950, and 2950 hardware.
Main board temperature
OID = .1.3.6.1.4.1.674.10892.1.700.20.1.6.1.1
Backplain temperature
OID = .1.3.6.1.4.1.674.10892.1.700.20.1.6.1.5
Note that the return values need a 0.1 multiplier.