Managing documentation in a rapid/agile/extreme programming environment

[Robert_Johnson -at- percussion -dot- com]

Reviewing the archives, I've found some discussion of creating 
documentation in a rapid or agile environment, but nothing about managing 
user documentation in such an environment.  Our development team is 
adopting agile development methods, and I've been asked to explain how we 
are going to fit documentation into this process.  JoAnn Hackos's book was 
great when I needed to develop a documentation model that matched the 
waterfall model we used previously, since the Hackos model is itself 
essentially a waterfall model.  But her concepts don't adapt well to an 
agile environment. 

Most of what I've been able to find on the web about documentation in 
agaile environments is about internal code documentation rather than about 
product user documentation.  Does anyone who has worked in an 
agile/rapid/extreme environment have any recommendations about managing 
user documentation in that environment?

Bob Johnson
Documentation Specialist
Percussion Software
Stoneham, MA