Here is a quick example on DZone of how to build a web service using Mule, CXF and Spring: http://java.dzone.com/articles/web-services-with-mule-cxf-and

The second maintenance release for Mule 2.0 is now available for download. This release includes new support for [proxying web services], [stream-based XPath routing], a more efficient XSLT engine, major improvements to the Jetty transport and Scripting module, as well as a number of fixes/improvements for CXF, Transactions, Notifications, and more.

Two new examples have been added: "Bookstore" which illustrates CXF and "Change Machine" which illustrates Scripting using Groovy and Python. And although there's still lots to do, significant progress has been made towards updating the [Users Guide] and [Schema Annotations] for Mule 2.0

For more information, see the Release Notes.