Ivo Jansch has an update on this year's Dutch PHP Conference 2008 posted to his blog today:

The first results of the CFI have been announced. Most requested speaker was Derick Rethans. He'll be at DPC and present an XDebug workshop on the Tutorial Day, and a presentation about the ezComponents framework on the main conference. Most requested topic was a look ahead at PHP5.3 and PHP6. We've found Stefan Priebsch, experienced speaker and expert on PHP migration, to be willing to present this topic. On the main conference day, he will give an overview of the future of PHP.

They're still in the process of looking for other speakers to fill in the last two spots abut the lineup for the rest of the conference is impressive - speakers like Zeev Suraski, Sebastian Bergmann, Gaylord Duke and Ivo Jansch himself will be presenting.

You can get more information about this two day event on the conference's main site.