List of places to find information about Oracle Web Services Manager (OWSM):

Oracle:

• OTN Product Page
• OWSM Partner Briefing (Must be Partner to access)

Articles:

• Protect your SOA investments with Oracle Web Services Manager: Be Secure and Productive by Peter Lorenzen (From ODTUG Technical Journal Q1 2009)

Presentations:

• Securing Web Services – From Encryption to a Web Service Security Infrastructure (From UKOUG 2007)
• Simplifying Web Services Development with the Decorator Pattern (OTN Dec. 2007)
  
• Securing Web Services with OWSM by Matt Topper
• Securing Web Service by David Rowe (Must be a member of UKOUG to read)
• Java Technology and Web Services Security in Action - Marc and Vikas at JavaOne
• Vikas Jain and Marc Chanliau Open World 2007 (cboracle/oraclec6)

Blog:

• Vikas Jain's Web Services Security Blog

Books:

• Oracle Web Services Manager by Sitaraman Lakshminarayanan

OTN Discussion Forums:
OWSM do not have it's own forum on OTN. OWSM is part of the SOA Suite so the forum with most OWSM posts are the one for the SOA Suite.

On-line Documentation:
For release/patch set 10.1.3.4.0:

• Web Services Manager Administrator's Guide
• Web Services Manager Deployment Guide

For release/patch set 10.1.3.3.0:

• Web Services Manager Deployment Guide
• Web Services Manager Administrator's Guide
• Web Services Manager Extensibility Guide - NEW!
  
• Web Services Manager Upgrade Guide - NEW!
  

For release 10.1.3.1.0:

• Web Services Manager Administrator's Guide
• Web Services Manager Deployment Guide
• Web Services Manager Installation Guide
• Web Services Manager Quick Start Guide
• Oracle SOA Suite Developer's Guide - Chapter 10 Securing the System

Related documentation:

• OAS Web Services Security Guide (10.1.3.1.0)
• Oracle Containers for J2EE Security Guide (10.1.3.1.0)

Oracle By Example:

• Creating a Custom Policy Step in Oracle Web Services Manager
• Securing Oracle SOA Applications Using Oracle Web Servies Manager Agent
• Setting up the Oracle Web Services Manager High-Availability (HA) Topology
• Configuring Oracle Web Services Manager for High Availability (HA)