Cool contest. It was interesting to view the logos currently submitted. Insignia001's draft #94 is awesome. The use of white space and creating the up arrow was great. It is simple and can be recreated using any color(s) without having to revise the graphic because of the simple shape.
There are some other decent designs but that is the only one that really worked for me. Not that I have any say whatsoever in this but I wanted to at least comment on the good work.