Giovannella, Carlo, STF Dept. Tor Vergata University of Rome and Creative Industries - CRR Greenspan, Anna, NYU Shanghai Shanghai, China-200122 GroĢnvall, Erik, IT Uni. of Copenhagen Rued Langgaards Vej 7 Copenhagen, Denmark Gulliksen, Jan, KTH Royal Inst. of Technology SE-100 44 Stockholm, Sweden