LinkedIn (LNKD) claims over 160M+ registered users, but on average, their usage rate is far...

LinkedIn (LNKD) claims over 160M+ registered users, but on average, their usage rate is far below that of Facebook and Twitter users. The company hopes an upcoming site re-design - LinkedIn's first major overhaul in years - will help narrow that gap. New features encourage checking in for news content, posting status updates, and messaging contacts. Those concepts seem vaguely familiar...