Over the years I have stopped using the term as to me PKM is actually what KM is really all about. It is social, it is about people and deeply personal.
Most of the technical stuff has little to do with KM and is more about information management. Important and essential, I always say you need to do good IM, before you do KM but its IM nevertheless.
In fact the term does not seem to be greatly used these days though there is Wikipedia entry for PKM. But there is a place where the term PKM dominates and that is in the blog of Harold Jarche. You will find his blog here and the PKM section here. He tweets at @hjarche. And, if like me you get your news through your RSS reader you can subscribe to his main RSS feed here
[Note if you use Google Chrome as your browser then install the RSS Subscription Extension to make it easy to view and to subscribe to RSS feeds embedded in websites. Why on earth, this is not a standard feature of Google Chrome I do not know!]
Harold really understands what KM and PKM are all about and he is a prolific blogger with lots of good graphics to illustrate his points.
PKM: A set of processes, individually constructed, to help each of us make sense of our world & work more effectively.
Credit: Harold Jarche
Want to know more? Then watch this 10 minute introduction to PKM.