The tenth FOSDEM is a two-day event organized by volunteers to promote the widespread use of Free and Open Source software.
At least this video is directly related to maemo: http://video.fosdem.org/2010/maintracks/maemo.xvid.avi It's Elena Reshetovas talk on maemo 6 platform security.
Here's the schedule: http://fosdem.org/2010/schedule/days
(Videos should become available at http://www.youtube.com/fosdemtalks as well. But they're not there yet.)