While the initial UDDI specification focused on Web service description and discovery on an Internet scale, subsequent UDDI refinements brought the registry standard increasing into the realm of more traditional enterprise computing as well. Version 3.0's most significant improvements allow an enterprise to introduce Web services gradually: Starting from internal pilot projects, UDDI 3.0 facilitates gradual migration of a service to a shared, intranet-style setting, then to the enterprise extranet, and finally to the Web. That way, Version 3.0 expands UDDI's initial mission.
Does anyone use UDDI out there? What do you think of UDDI, in general?