An article in 9CBS
http://blog.9cbs.net/asj/archive/2004/10/21/146224.aspx?pending=true
The same thing is very icing with my current situation, maybe my own development is more far away from Agile.
Customers in the United States, transfer from customers to developers to pass two middlemen
However, many of the practices and philosophy in XP is that any project process is worth promoting.
It is difficult for demand, for the quality of the project, managers should strive to create communication channels, developers should "thick face" to request demand