D2RQ - Treating Non-RDF Databases as Virtual RDF Graphs "Using D2RQ you can:
* access information in a non-RDF database using the Jena model API.
* query a non-RDF database using RDQL or find(spo).
* do RDFS and OWL inferencing over the content of a non-RDF database using the Jena ontology API.
* publish the content of a non-RDF database on the Semantic Web using the Joseki RDF server."
D2R is already integrated into TKS 2.0 and hopefully we'll get D2RQ in there. Good to see it using RDF for configuration.