Proxy Server that uses Http Caching
tool for improving Scalabil Ity
http://answers.google.com/answers/threadview?id=779626
http://joshua.schachter.org/2008/01/proxy.html
Squid http://www.squid-cache.org/
Mark Nottingham thinks of it as his ESB
Apa Che http://www.acm.org/crossroads/xrds7-5/proxy.html
Var Nish http://varnish.projects.linpro.no/wiki/FAQ
Ink Tomi Traffic Server http://www.ogre.com/node/320
Jun'2007: Mark Nottingham on how consistently it's done.