That depends on what you want to do with it. As Phil said, integration with Dataverse will happen later, but the server and library are useful in their own right. For example, we modeled a social benefit public policy with it (Israel's unemployment entitlements) and have done some work with IRBs, DUA workgroups etc. Also, the server itself has been upgraded lately, so if you have a specific questionnaire you want to make available to users, we can host it on our instance.
Please tell us more about your plans with DataTags, I'll be happy to help :-)
-- Michael