Is there a difference between KM & Social Media

Interesting blog post at HBR – Social Media versus Knowledge Management.

I believe KM is and has been  inherently social in nature since the disciplines inception.  The problem, as the author points out is that charlatans have been able to divert the nature and meaning of KM to meet their purposes, much like media has transformed the term ‘hacker’ from something good to something evil.  At its most fundamental level knowledge management is about connectedness and this is social.