Try ebXML Registry online - and handy resources

A community test registry is now available online that allows you to interact with an ebXML registry instance through a web browser interface.

The access link is here: http://registry.paradigma.net/omar

A simple search that works is for items with description containing: %xml%

In addition the page link here contains handy reference material to help you get started with your own ebXML Registry project:
http://ebxmlrr.sourceforge.net/tmp/ebXMLRegistryLinks.html

All these tools are showing how it is becoming much easier to stand-up your own registry project and build practical user interface constructs for it that deliver business solutions.