For details see the jUDDI website or the TSS announcement. This release duplicates the functionality that is available in jUDDIv2.x and we'll be working on the newly added UDDI v3 APIs (such as the Subscription, Replication and Custody transfer) going forward. To get started we created a ready-to-go UDDI v3 server in one download: juddi-tomcat.zip (based on jUDDI-3.0.0.alpha, Tomcat and Derby). Please contact us if you want to help out. Now that the jUDDI-v3.x code base is functional it is relativity easy to contribute.