I am again experimenting with the Cherokee  web server in my stack for k0nsl.org — it currently handles the PHP backend of it all, which so far seems to be working quite nice. Nginx is used as frontend and for most static files, finally Apache2 is used for miscellaneous tasks. The last time I used Cherokee for my projects was briefly in October of last year (2012).
I will investigate more as time goes on, but it looks as if I will be using Cherokee permanently in the stack.
1. Cherokee is a flexible, very fast, lightweight Web server. It is implemented entirely in C, and has no dependencies beyond a standard C library. It is embeddable and extensible with plug-ins. It supports on-the-fly configuration, TLS/SSL, virtual hosts, authentication, cache friendly features, PHP, custom error management, several load balancing policies, database balancing, and much more. Check out their Github for more information: https://github.com/cherokee/webserver/