Try as I might, I can not get newlines in the output either via the web page submission or via send_nrdp.pl. I've tried \n, \\n, actual newlines and all I ever get is the first line and that's it.

I was glad to see this get developed. We've been migrating away from NSCA to NRDP for multiple reasons:
- Long output support.
- More consistent results interfacing with a web server rather than the NSCA daemon.
- Easier to develop interfaces against URL encoded XML submissions (easy multi-language / multi-platform support).
- It may be my imagination but check results seem to get picked up faster by nagios through NRPD.

I wished it came with a client in another language but PHP. We don't have php binaries in our environment.

I've written a perl based client that uses the NRDP protocol but functions as a dropin replacement for send_nsca. I may post if there's interest.

This is a huge step forward from NSCA, thanks for the contribution. No more external config is a huge plus, as is the firewall hassle being eliminated.