While wrestling to get Rails back up and running on my laptop after upgrading to Snow Leopard, I noticed something interesting on the Phusion Passenger (mod_rails) site: it supports nginx. If I ever have free time (a laughable proposition), I’d like to give that a whirl. Something tells me that Passenger on nginx may outperform Mongrel clusters by a long shot. Especially if you mix in Phusion’s Ruby Enterprise Edition.
(If you’re playing with fun configurations, I’d like to throw varnish and haproxy into the mix, too.)