LibreOffice has a DevRoom at FOSDEM!
FOSDEM is the premier open source developers conference, and the most significant developers conference for LibreOffice after the annual LibreOffice conference. Please find time to come if you can. Talk submissions about the LibreOffice project is welcome: development, infrastructure, marketing, code overviews, specific features etc. but must have a focus on, and be accessible to developers.
Here’s our Call for Papers: http://wiki.documentfoundation.org/Marketing/Events/Fosdem2012