Apache Maven 2: Effective Implementation (Maria Odea Ching, Brett Porter; September 2009) - Build and manage applications with Maven, Continuum and Archiva.
Java Power Tools (John Smart; April 2008) - Covers Continuum as well as other Continuous Integration servers, and a number of related tools such as Maven.
Apache Continuum - Build, Test, and Release - Wendy Smoak - ApacheCon EU, March 27, 2009
Enterprise build and test in the cloud - Carlos Sanchez - ApacheCon EU, March 27, 2009
The Best Continuous Integration Tools - Vlad Kofman - February, 2009
Apache Continuum - A Detailed Look at the Open Source Continuous Integration System - Soumya - November 27th, 2008
Apache Continuum review and operation - October 30th, 2008
Article about Continuum in the JavaMagazin 07.2007 (leading German journal on Java) : "Kontinuierlich zum Ziel - Eine Einf�hrung in Maven Continuum" (German)
Continuous integration: Continuum - August 4th, 2007