On the PHP London conference website (from the recently passed PHP London 2008) has posted the first of many mp3s of the session that happened there. This first one comes from Ivo Jansch.

His presentation is titled Enterprise PHP Development and looks at things like whether or not PHP is "enterprise ready", how PHP's role in the online world has changed and some steps to take to be sure your application is ready to serve your enterprise.

The slides can be found here and the mp3 of the presentation is here.