Lydia,
Showing the link to the concept URI on the client intended for human browsers is a little confusing. I tried that link, but the content negotiation fooled me into thinking it was just a redirect and lead me astray.
An example that I have found very valuable in my work is UniProt - one of the earliest adopters of semantic web technology in the life sciences. See for example,
and click on 'Format' in the middle of the page there. Provides both human and various computational representations of the data.
At one point in time, I recall that freebase added an 'RDF' link to each of their pages. Obviously they aren't the model to follow for everything... but I remember that being a well-received step forward.
-Ben
p.s. Having very visible links to PDF versions of these pages but not structured data just seems wrong . ;)