The graphics below the logo in #129 aren't meant to represent anything specific. Just showing that the shape can be used with icons representing different facets topics of the conference.
# 136 the graphic seems to keep getting bigger. The whole does not seem in a good balance / proportion. The eye is trying to focus on too much at once. You have this wonderful powerful graphic then these words that shout at you too. So for me the words are in competition with the graphic. Hope this helps
# 128, 130, # 136 Let me try to be a little more specific. The image and words all seem too large. There is not enough white space at the top or at the bottom. Don't get me wrong... I like your graphic... it is just everything just seems too big. Hope this helps. I look forward to your update.