There's an excellent open source conference that happens every year in Brussels in February, called FOSDEM. It consists of some main tracks, plus a series of sub-rooms, where various technical communities are given some space to use for whichever talks they choose; the schedules are centralised so that people can pop in and visit any talks in any room that looks interesting. This year, for the first time, this includes a "PHP and Friends" room - I'll be organising this and I'm looking for your input, please.
The event is on the 2nd and 3rd of February and is an interdisciplinary conference of open source minded developers from all over the world. There's lots of different rooms that make up the event and they're accepting submissions for the PHP room right now through December 1st.