What sort of things are you trying to integrate?
If you are trying integrate nagios events into Orion I would use the unix agent and watch the /usr/local/nagios/var/nagios.log file, or better yet, sent up your event objects to use an event handler so you can massage the event with perl or something and reformat it into something more meaningful. From there you can log it where ever you want and using the unix agent/log file monitor pull that data.
