I tried to find a logo, that symbolizes the conference by its form (2 overlapped edged bubbles - stand for coming together, speaking, taking position, discussion, exchange ...) and that gives me flexibility to work with. Because for me a more modular identity for such an event works better than a fixed logo. It underlines the intention of collaboration, development, openness, forward-thinking and creativity.
Furthermore it can be used for the information/pictogram system and different promotion things easily.
Transparency and color gradient could make the logo more modern and support the thought of meeting & exchange in another way.
It also works good in black, on different colors, on photographs, in positive & negative, as pattern as well as in cutted parts.
Hope you like it!