MozFest will happen in London at the beginning of November. (https://2015.mozillafestival.org/)
It’s a huge and open event, driven by people providing sessions.
It would be great if the Rust community would be present there in some capacity, so please consider submitting a proposal! (https://2015.mozillafestival.org/proposals)
Deadline is the 31st of August.
Florian (Rust community team)