My colleague Mike Gilronan asked me the other day if I knew of a LinkedIn ranking tool. The minute he asked, I needed such an app to exist. I couldn't turn anything up online, and I almost can't believe this hasn't been created yet. It could function just like the one that's out there for Flickr, delivering only a number, but better yet (as Mike suggested) it would show you how you compare to all the other LinkedIn profiles, with a visual such as the following:
If anyone knows of a tool that does this, please let me know!