I linked to the techno-centric description from the US government a few days ago, and both Yigal Chamish and Shawn Callahan rightly complained in the comments that it missed whole aspects of KM that are important to the field. Here is some thought on the way I think about KM.
The August 2006 TOC Update from Goldratt Marketing Group includes an item on The Impact of Multitasking by Mike Mannion and Sven Ehrke.
Patrick Lambe has self-published a piece he calls "Money, Testosterone and Knowledge Management" which discusses a schism in KMPro in 2004.