On the Dutch PHP Conference's site today there's a new post from Stefan Koopmanschap, the organizer of this year's DPC Unconference, talking about some of the recent advancements in it's organization.
Last year we introduced the uncon track at Dutch PHP Conference, a separate track next to the conference tracks where you, the attendees of the conference, could be the speaker. [...] It was a great success thanks to all the speakers who stepped up to take an open slot and present their topic. [...] This year, we have a bit more time in the morning to register for a slot.
He also mentions the lightning talks (that were popular) and where they'll be in the overall schedule. For more information about the conference, look at their site and maybe pick up your ticket while you're there (Full ticket is 695 Euro, Tutorial only is 375 Euro and just the conference is 375 Euro).