Urs Gasser has been back the past few days in the US, his first trip
back since he left for his professorship at the Univ. of St.
Gallen.  (Prof. Dr. Gasser remains a faculty fellow with us at the
Berkman Center.)  Along with summer intern Gabriela Ruiz Begue, he
has released a short, accessible paper on the iTunes Music Store after the 500 millionth song was downloaded.