There really are some very creative ideas, I think a few people may have missed their calling. I really like the logo with the slouch hat guy but wonder if it looks too similar to that other networking site. That being said, my second pick would be the RecruitingBlogs.com bubble from Recruiter Guy.
I like most of the submissions and regardless which one is picked a tag line is needed. The name RecruitingBlogs.com can give off a notion that one must be a blogger. Us users know that to not be the case but this logo is as much to market the site to new people as it is to brand the site.
Recruiter Guy's tag line "The Social Network For The Recruiting Industry" must be (humbly I suggest) included with any logo.
Hey There. My laptop for some reason is not allowing me to open a word document so I am sorry I cannot upload this to the top of the post and in fact, I cannot even see them. I will update the post with your logo tomorrow evening. Thanks