I recently did some research on integrating nagios w/HP OpenView and determined that it requires developing an SNMP proxy for nagios to remotely send events which HP OpenView can receive via the Network Node Manager (NNM).
Developing this SNMP proxy requires the use of the NNM SDK, of which I could not find a trial version on HP's web site, and costs about $1K for the license.
That's as far as I got as the go-ahead to purchase the NNM license has not been approved yet.
One other thing to mention, there is an SNMP MIB for nagios events available from the nagios plugins downloads page on SourceForge.net at
sourceforge.net/project/showfile ... p_id=29880
To note, I've never used HP OpenView nor have any access to NNM, so I've arrived at this just from reading the doc. Anyone who has any experience with HP OpenView/NNM please feel free to chime in and comment/correct where necessary.