Authors' Addresses Christian Hoene (editor) Universitaet Tuebingen Sand 13 Tuebingen, 72076 Germany Email: hoene@uni-tuebingen.de Jean-Marc Valin Mozilla Corporation 650 Castro Street Mountain View, CA 94041 USA Phone: +1 650 903-0800 Email: jmvalin@jmvalin.ca Koen Vos Skype Technologies S.A. Stadsgarden 6 Stockholm, 11645 Sweden Email: koen.vos@skype.net Jan Skoglund Google Email: jks@google.com