I love the square graphical button to the left of the logo, it is similar to the size and shape of the various social networks I participate with (e.g., LinkedIn, Facebook, twitter, etc.), however, I don't love the "CM" in cursive in the box... what else could we put there? Something that is more indicative of connecting PEOPLE would be preferred... no need to put the company initials in the logo.
I like the square share of #10 but even though I really like the interlocking puzzle pieces, I feel like it is cliche or overdone... pretty common item. don't think I'm a fan of #9 graphic. I like the treatment of the company name in #10.