NuSOAP Website
This contains update announcements, API documentation, and links to resources such as the WSDL example provided below.

NuSOAP on my weblog
This page has links to articles and tutorials about NuSOAP, as well as public examples of usage such as Amazon and Google.

WROX NuSOAP Chapter
Probably the most thorough overall guide to using NuSOAP. Doesn't contain WSDL generation information, but has just about everything else. A must-read for any NuSOAP user.

A thorough example of configuring and enabling wsdl for a server, using both simple and complex types, is available
here.

Once wsdl has been configured for a server instance, it can be generated by appending "?wsdl" onto the endpoint URL.Link