I've used Joseki to put up a SPARQL interface to querying the Oxford OpenGuides RDF at
http://surguy.net/joseki/query.html
e.g.
PREFIX dc: http://purl.org/dc/elements/1.1/ PREFIX geo: http://www.w3.org/2003/01/geo/wgs84_pos# SELECT ?title ?lat ?long WHERE { ?place dc:subject 'Pubs' . ?place dc:title ?title . ?place geo:lat ?lat . ?place geo:long ?long }
to find the latitude and longitude of all the pubs. It will return XML, formatted text, or JSON.
The data is from a spider of the site that I did today - I've got the code to keep it up-to-date from Recent Changes, but I haven't hooked it in yet. I probably will in the next few days.
Cheers
Inigo