Spring Data is a project containing common support for building data repositories in Spring on top of Java persistence frameworks and abstractions as well as sophisticated support for NoSQL databases.
The Hades project will be continued, but there will be no next major release 3.0. The Hades source code will be integrated in the Spring data subprojects Common and JPA instead.
Further Spring data subprojects contain support for graph databases (Neo4j), key-value stores (Riak, Redis), document databases (CouchDB and MongoDB) and Map-Reduce jobs with Hadoop. Currently version 1.0.0 M3 is out, but release 1.0-Final should be there soon in spring 2011.