went to beantown for https://libreplanet.org/2015/
see some sample videos here:
i will write more on my personal experience but for now see what the fsf has to say here https://www.fsf.org/blogs/community/libreplanet-2015-highlights-and-what-comes-next
here’s the video archive http://media.libreplanet.org/
and here’s a session i attended on blender: http://media.libreplanet.org/u/libby/m/bassam-kurdali/
thanks for your interest, stephen