I've found some great speakers for the track on Big Data I'm organizing this Friday during the Open World Forum (note that the talk will be in French): Romain Chaumais (Ysance): “Big Data : noSql, Map&Reduce, RDBMS - Quoi utiliser et quand ?” Florian Douetteau (Dataiku): "Open Source et science de la donnée".

I have just finished writing a new white paper on the convergence of Big Data and Open Source.