While reading/idly Googling, I came across this initiative:

“SeMuSe [1] is an open and collaborative community based project to work on a Semantic Museum vision, and provides a forum for discussion of the future of applied cultural and natural heritage data management. The goal of SeMuSe is to help organizations and practitioners to introduce Semantic Web technologies and concepts to cultural and natural heritage data management efforts.”

Above quote from: http://semanticweb.com/semuse-the-future-of-semantic-museum-data_b10921
And a wiki about it: http://www.semuse.org/index.php?title=Semuse