some good Ruby + Rails reads for the day

Threading in Ruby (and other dynamic languages with a GIL)
http://www.igvita.com/2008/11/13/concurrency-is-a-myth-in-ruby/

Rails deployment:
http://www.loudthinking.com/posts/30-myth-1-rails-is-hard-to-deploy

Nginx + memcached
http://www.igvita.com/2008/02/11/nginx-and-memcached-a-400-boost/