<p>Are you working on a (probably commercial) product which uses RDF/OWL/SPARQL technologies? If so, can you please describe your product?</p>

O'Reilly's Practical RDF has a chatper titled
Commercial Uses of RDF/XML
. The table at the left lists the subsections:
Chandler
,
RDF Gateway
,
Seamark
, and Adobe's
XMP
stuff.