To get ahead with this post, it is not meant to be an accurate reflection of reality. You may or may not recognize these characters or may only be able to partly relate to them. This post is meant to provide more humorous relief than genuine insight. That said, by Toutatis, let me proceed.
Look around in your organization or even your personal social circles. You may possibly find at least one of the characters described below, only their names are likely to be very different. You need to understand what roles they might play in your knowledge management program/strategy before the sky falls on your head. Let's call the program, you are in charge of, KMix as it rhymes with the characters' names and sounds harmonious etc.
Asterix: A star hero(ine) who is both intelligent and action-oriented. A person who shares his knowledge on the go and inspires others to solve problems, accomplish things and stay active and alert in life and at work. But he also knows when he must keep his mouth shut. Your knowledge management program - KMix - must engage him at any cost. He is your program Salesman (Ref: Malcolm Gladwell's Tipping Point) in more ways than one. He needs a micro-blogging account if not anything else.
Obelix: A good-natured but ignorant bloke (or girl) who is happy following Asterix around and using his 'raw' skills when asked to. He can beat up the bugs and be the life and soul of a wild-boar party. He does not consume the magic potion of knowledge but is nevertheless an asset in certain situations. He may never understand the meaning of a knowledge management program (KMix, in this case) but he needs to be mentored by one of the Asterixes so his skills are leveraged upon. He needs to follow Asterix's tweets even if Getafix (coming later) does not allow him to consume any of his blog recipes. He may need a micro-blogging account to at least declare that he has spotted boars (opportunities) or Romans (competition)
PS: All credit for this post goes to the authors of the Asterix and Obelix series (Goscinny and Uderzo). My version of these characters, for KMix, are nothing but simple extensions of the real characters.