I'm sure having Cal Henderson around to make the presentation would be really helpful, and probably much more entertaining, but the PDF of his slides for a presentation on Flickr to the Vancouver Php Users meeting still has lots of crunchy goodness.
Having seen two or three of these slide decks from other compaines, I'm struck how these systems become polyglot so fast. In Henderson's talk, a template language (Smarty), a server page language (Php), and a systems language (Java) all make appearances. Not to mention good old HTML, XML, and SQL. Oh and throw in some Perl to help coordinate all of this stuff.
Slides hosted by Niall Kennedy. Received via some twisty path probably passing through del.icio.us.
And yet another vote for Php sucks, although I'm guessing it was tounge in cheek.