I am currently downloading the OpenNMS vmware image. I will be looking at that and OSSIM over the next few days. I like the fact that both of those projects provide Vmware images. These are two enterprise class systems that use trapping/SNMP. I am also continuing to evaluate Zabbix. I believe that I will use Zabbix for the immediate future while I am setting up OpenNMS and OSSIM.
I am off to bed for an hour and then I have some DLR work to do tonight.
Will write more about my monitoring tool evaluation tomorrow.