Hello rails-talk,
A colleague of me recently did some benchmarking on different ways to
server Rails (Lighttpd + FCgi, Lighttpd+Thin, Nginx+Ebb, and so on) to
find the best solution for our shared hosting. He did a writeup about
it onhttp://www.openminds.be/article/benchmarking-ebb-thin-mongrel-and-fastcgi-for-ruby-on-rails-hosting
.
Maybe this is interesting for some of you. If this is not the place to
inform about this, I'm sorry 
Regards, Jan De Poorter