''Extreme Programming Installed " by Ron Jeffries, Ann Anderson and Chet Hendrickson
images.amazon.com
ISBN: 0201708426. Book Two (or Three) of the Xp Series. Based on our experience on the original XP project and the others we have helped with, this book describes what makes XP work, day to day and month to month.
Where is the errata?
Why does the book on page 7 say Manager and Customer Rights as opposed to just Customer Rights?
TBD
What roles are still hip?
There are two: customer and programmer. We mentioned manager because we wanted to point out that you probably need to have one around. But XP is built around just the two, customer and programmer.
-- quote from Ron Jeffries
See also groups.yahoo.com 
for another take on this question.
See original on c2.com