In a joint project between HP and SAP run in the Co-Innovation Lab we created a How-to Document on the integration of both companies Service Registries.
The beauty of the integration is the usage of HP Systinet Foundation as the underlying UDDI v3 server for SAP's Services Registry. That means you get both the functionalities of SAP SR and HP Systinet without dublicating the data stored in the registries. With that you can avoid running into inconsistencies that might occur with traditional copying of registry content.
Be sure to read the document "How to Set Up an Interoperable Scenario with SAP NetWeaver Services Registry and HP SOA Governance S..." now available.
If you're subscribed to the Virtual TechEd 08 you might want to watch Applying Enterprise SOA in Heterogeneous SOA Landscapes for some background on the Heterogeneous SOA initiative that provided the framework for the joint work. Also check out peter.kulka/blog "How to deal with heterogeneous eSOA Landscapes" for more on the general topic.
