Quite some interesting stuff already.
I'd be generally interested how companies (including the large ones) are dealing with the call for conflict-free resources, including legislation. What are new developments there, for the whole industry? What happened policy-wise in companies? The industry had a cooling off period, I remember, of two years after the Dobbs-Frank act - what's happening today? What's in the greater picture, compared to two years ago?
Of course, since I assume there will be some MediaTek people around, FP could try to lobby them a bit to support the communities call for opening their codebase. We want to be able to keep our phones as secure as possible, i.e. to get updates for the OS.
In addition to Stefan's and Ben's questions, the "open" baseband questions springs to mind - you could try to get into a discussion about that with both the Ubuntu/Sailfish people, and Blackphone. I'm sure that @Herve5 as a supporter of OpenMoko would like to get some info there, too.
Talking about Ubuntu, there's the Aquaris 4.5 of bq, allegedly the first Ubuntu phone on the European market. Those guys must face some similar problems as FP is, minus the general social responsibility/ecological responsibility issues. (They chose a MediaTek chip as well, BTW. Actually, the specs are pretty comparable to a FP.)
Some people form Project Ara will also be there, I presume. Would be interesting to get some news from them. While they seem to be "too big" for a cooperation, FP should still have a go and see what you can achieve.
Last, but not least, I'd like to know how FP's initiative for a workers representation is perceived by other (small) producers.
If any other company or project would move to raw materials from more sustainable sources, and/or more social responsibility because FP showed that there are some options for it, that would be quite an good. Go for it, @joe.