The current edition of MIT’s ZigZag podcast (Episode 12) features CMS Director (and Project NML Primary Investigator) Henry Jenkins and Project NML Research Assistant Neal Grigsby discussing the Project NML Exemplar Library, and the TATs Cru graffiti exemplar in particular.
Check it out at http://libstaff.mit.edu/amps/zigzag/ (it’s about a third of the way through Episode 12).