Sat, 26 May 2007:
Brian Shire has put up his slides (835k PDF) of his php|tek talk.
Quite interesting procedures followed to prevent the very obvious cache slam issues by firewalling the apache while restarting it, as well as the priming sub-system they use. Also the cross-server (aka site-vars) seem like a good idea as well - a basic curl POST request moving around json data could potentially serve as a half-reliable cross-server config propogator.
Seeing my code used makes happy ... very happy, indeed.
--I'm willing to make the mistakes if someone else is willing to learn from them.