In the first week of September, we had the chance to speak at Campus Party Europe about Firefox OS. My talk was a showcase of the tools we can use to develop Firefox OS apps and how you can get involved with the community.
Francisco Jordano also spoke about Offline Mode and Push Notifications (do check them out!).
PS: this was my first experience with slid.es and it was not a very good one. The service went down a few hours before our presentations. We were lucky we had backups and could ran them locally with reveal.js, but the styles were messed up :(