Hi Andrew,
Microsoft has plans to deliver a UDDI v3 package (both client and server) sometime after the Longhorn server release. The UDDI Services website (
http://www.microsoft.com/windowsserver2003/technologies/idm/uddi/default.mspx) is a good site to monitor for further information.
Thank you for your interest in MSDN, and let us know if we can assist you further.
Sincerely,
Microsoft Windows SDK Feedback Team