The Technology of Daily Kos: Introducing mod_mcpage
A while back, I discussed the caching used on DailyKos with a hacked up mod_magnet and a lua script to serve up pages for anonymous users out of memcached, so it would avoid hitting the much larger mod_perl apaches on the backend running Scoop. It worked very well, but I never liked having all the extra overhead of mod_magnet when I was only using a small amount of its functionality.