For of all you who plays with RDF crap, there is a nice tool RDFAuthor that help you to create rdf instance data. ->"Authoring is largely a matter of dragging in data and binding it together using a graphical interface.". It is a nice tool really handy for authoring RDF (and querying it...). I am also pleased that the huge robot in their logo comes from Robotech (in the robotech series, RDF stands for Robotech Defense Force).