A first Ant Build. Sample chapter. (Link is broken.)
Ant in eclipse How to use Ant in Eclipse. A sample an EJB 3 project is used.
"Apache Ant 101: Make Java builds a snap" on IBM Developerworks by Matt Chapman from December 2003. Needs registration.
Introduction to Ant - HTML slide show describing the purpose and uses of Ant
Introduction to Ant - Wikibook on ant with many examples using XSLT