I've just installed 2x APC SUA3000RMI2U's, and a APC Network Management Card 10/100 BASE-T (AP9617) into each. SNMP has been enabled, but I am having similar issues with connecting up the monitoring with Hyperic.
pepijn - thanks for sharing! If you wouldn't mind, please add these plugins and related info to the HyperFORGE (http://www.hyperic.com/hyperforge) so folks can better search them & we will award you points! And who knows... maybe even next month's Plugin of the Month Award! http://www.hyperic.com/resources/plugin_of_the_month.html