Who REALLY uses LinkedIn?

LinkedIn is currently touting that they have over 60 million members, but I truly wonder how many of these users are active.

I consider myself the typical user.  I signed up for the account a few years back at the suggestion of some colleagues, built a simple profile and added a few connections... then did virtually nothing.  Every few months I become re-inspired to update my profile, respond to some invites and send some more to new connections.  As far as I can tell all this has done is give me a professional web presence that I really do not use for anything meaningful!

Realizing a significant amount of my time has gone into building my profile and connections over the years it is now time to take action and see what LinkedIn can do for me.  I would like to hear real world, personal responses for how LI has helped or will help you in your career.  Hopefully your responses will send me down the path to enlightenment.

For those not aware of what LinkedIn is, here is a 2 minute video introduction: