I attended the 2007 DC PHP Conference few weeks ago. Still working on my notes to present what I learned to others at my company, but at least I can post links to all the presentations I found so far:
November 28th, 2007
While helping maintain the New World Encyclopedia, I tried to install the LuceneSearch extension to replace the default MySQL-full-text-based search used by MediaWiki. Since our server did not come with any pre-requisites necessary for compiling and running Java applications, I spent quite some time on it, and still did not get it to work.
All of sudden (hint, hint,) a message came to the mediawiki developers list about a new search extension that uses Sphinx search engine. Installing Sphinx was a breeze! The extension was an initial “request-for-comments” version, so I started working with the author to spruce it up. You can see the results at NWE, MediaWiki.org, and SourceForge.
October 19th, 2007
Officially, ohloh is “Mapping the open source world by collecting objective information on open source projects.” Practically, you can go there to see how much time/money it might take to produce a project such as MediaWiki ($3,810,127?)
October 22nd, 2006