As Ivo Jansch mentions, the speaker list for this year's Dutch PHP conference has been finalized:

Based on feedback from the 'call for ideas' we have added a session on security. It will be presented by Johann-Peter Hartmann, the CTO of Mayflower. Also, we are happy to announce that Terry Chay, a well-known blogger in the PHP community and informally called the 'PHP terrorist', will deliver the closing keynote.

You can check out the rest of the presentations (5 tutorials and 12 sessions) on the conference's schedule page and, if you haven't already yet, you can still register to reserve your spot to enjoy this great event (talks only, tutorials are sold out).