Some online references for Agile:
http://en.wikipedia.org/wiki/Agile software development
http://agilemodeling.com/essays
http://www.martinfowler.com/articles/newMethodology.html
http://www.ddj.com/showArticle.jhtml?articleID=184414755
http://www.agileadvice.com/archives/2006/09/practices of ag.html
http://agile-carolinas.pbwiki.com/WhatisAgile
http://www.versionone.net/Resources/AgileMethodologies.asp
http://www.agilemodeling.com/essays/agileRequirementsBestPractices.htm
http://agile.idyll.org/wiki/HandoutNotes
http://www.agilejournal.com/content/view/243/33
Applying "Theory of Constraints" and "Just-In-Time Practices" to coach agile teams
How to apply "Theory of Constraints" to coach agile team?
Selecting the Right Iteration Length for Your Software Development Process -- Mike Cohn
http://jamesshore.com/Agile-Book/assess your agility.html
http://steve-yegge.blogspot.com/2006/09/good-agile-bad-agile 27.html
http://www.theserverside.com/news/thread.tss?thread id=44783#230036