I like very much the concept of #12. The "puzzle" gives the idea of people connecting each other and being part of a project. Also colors are fine I don't like much the white area at the centre of the ball, may be you can do something for it. Eventually you could try to add something which recalls the other basic concepts of ours: web, money
Can you please try #36, giving a little more evidence to the white borders of the puzzle pieces, as you did in #35. And also try a version with the image on the side. Thanks