I'd like to be able to graph my ML530 temperature sensors using MRTG but haven't been able to find any useful info on how to go about doing so.

The following will output each item that has a temperature listed:

# hpasmcli -s "show temp" | grep C/

#1 CPU#1 27C/80F 110C/230F
#2 CPU#2 28C/82F 110C/230F
#3 PROCESSOR_ZONE 25C/77F 53C/127F
#4 I/O_ZONE 24C/75F 66C/150F
#5 SCSI_BACKPLANE_ZONE 21C/69F 66C/150F
#6 SCSI_BACKPLANE_ZONE 27C/80F 66C/150F

Unless there is a better way, my only thoughts so far are to create a script that runs hpasmcli every 5 minutes, grabs the necessary information and appropriately formats it into something MRTG can deal with.