Web Services Tutorial from SUN

http://java.sun.com/webservices/docs/2.0/tutorial/doc/

The Java Web Services Tutorial addresses the following technology areas:

The Java Architecture for XML Web Services (JAX-WS)
The Java Architecture for XML Binding (JAXB)
The StAX APIs and the Sun Java Streaming XML Parser implementation
SOAP with Attachments API for Java (SAAJ)
The Java Architecture for XML Registries
XML Digital Signature
Security in the Web Tier