Apache AXIS is an open-source implementation of SOAP. It is available in Java and various scripting languages.
JAX-RPC is a Java API for XML-based protocols such as SOAP.
Microsoft has released SOAP Developer Resources, including support for SOAP in Visual Studio.
Jon Bosak commented on SOAP and ebXML at the latest XML 2000 conference.
The W3C Web Services Activity is working on an official version of SOAP.
Making Teams Work, via XML and XSL, a chapter from my book Applied XML Solutions and excerpted on developerWorks, explains how presentation servlets can use XML and XSLT.
A review of SOAP books by the Dr Dobb's Journal.
First published by IBM developerWorks.