Wikidata includes links to Commons images via various properties. We could use these to finally show some images other than cover art.

The relevant properties seem to be:
P18 "image" - generic property which would be valid for artists, labels or areas.
P154 "logo image" - would be good for labels, some artists have them too.
P242 "locator map image" - would be good for areas.

Examples:
http://www.wikidata.org/wiki/Q1339 links to http://commons.wikimedia.org/wiki/File:Johann_Sebastian_Bach.jpg
http://www.wikidata.org/wiki/Q189 links to http://commons.wikimedia.org/wiki/File:Europe-Iceland.svg