Yeah, I agree. But doing this has allowed us to discover a potential issue on one of our other servers. When I got here, my boss has already installed an older devel version of Nagios. The one I installed is running just fine, as far as I can tell, but for some reason, the original Nagios seems kinda flaky. It keeps giving us Host Down alerts at random, when the other Nagios server (the newer one) doesn't report anything. I've checked configs and all is well on both boxes, check intervals, interval lengths all the same, so I'm guessing there's something wrong locally on the first Nagios box.
As a completely unrelated sidenote, I installed SuSe 10.0 on one of our other servers and found that it seems to come with a version of Nagios already on it...it's got some plugins though that I haven't seen with the Nagios vers. I'm running now.