We use FreeBSD 8.2, Rails 3.0.7, postgresql 8.3, passenger and nginx for our production servers.
http://www.freebsd.org/cgi/cvsweb.cgi/ports/www/rubygem-passenger/
We seems to have a odd configuration because no one seems to have something like ours. I feel a little alone. 🙂
Nevertheless, this configuration is quite easy to setup, it performs well and it’s very stable.
Is there a particular reason why Rails deveopper seems to avoid FreeBSD as a production server ?
Most probably most of development is made on Linux boxes, so it’s natural to choose the same or very similar environment for production.