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.
SolarWinds solutions are rooted in our deep connection to our user base in the THWACK® online community. More than 195,000 members are here to solve problems, share technology and best practices, and directly contribute to our product development process.