http://serverfault.com/questions/330638/forward-my-http-requests-from-my-ip-to-another-server
Forwarding all web traffic from an old to a new server with nginx, includes a sample config for nginx. Useful.
http://varnish.projects.linpro.no/
Varnish is a state-of-the-art, high-performance HTTP accelerator (reverse proxy). Varnish is designed by a BSD kernel developer to make full use of BSD / Linux kernel's ability to manage memory. It is extremely fast, up to 10 - 20 times faster than squid.
