There are many other XP related web sites. The following are great sources of education to help with GettingUpToSpeedWithXP.
[Wiki.ExtremeProgrammingRoadmap]
The original source of XP information (beware, there is a lot to get sucked into...<g>)
www.xprogramming.com/
Ron Jeffries has just put up a new site, an intended replacement for his long-standing www.armaties.com.
www.extremeprogramming.org/
Don Wells has some great diagrams that help visualize the process.
www.xpexchange.net/
Introduction into XP. Content in English and in German. Completely non-commercial.
Other External Links to XP:
www.xpexaggerated.com/
www.martinFowler.com/
MartinFowler's collection of ideas and musings about XP and many other interesting things
www.objectmentor.com
For Training and Mentoring in XP and OO. ObjectMentor Inc. is RobertCecilMartin's company providing XP training around the world.
www.ootips.org/xp.html
www.rolemodelsoft.com/studio.htm
Pay particular attention to the referenced workshop on "Software Development as a Studio Discipline" (www.rolemodelsoft.com/OOPSLA98/studio/index.htm). The positional papers have great relevence to XP - some support its ideas, and others refute them.
There is going to be an ExtremeProgrammingConference?:
eXtreme Programming and Flexible Processes in Software Engineering - XP2001
21-23 May, 2001
Sardinia, Italy
www.xp2001.org
And a conference in the US:
XP Universe
23-25 July, 2001
Raleigh, NC, USA
www.objectmentor.com/xpuniverse/
The first XPFest (XP version of Design + Code Fest from OOPSLA) will be held at XP Universe www.xpfest.org/
The first XP conference in the Nordic Region will be held in April:
eXtreme Programming
24-25 April, 2001
Stockholm, Sweden (The conference will be held in English)
www.euroforum.net/konferenser/program/extreme.htm
The Agile Alliance
www.agilealliance.org/
There is an Extreme Programming mailing list:
groups.yahoo.com/group/extremeprogramming/
there's also a small, low traffic XpMidlands (UK) mailing list.