MIT Press are currently in the process of moving their ALIFE and ECAL conference proceedings to a new home on their journal website. This will bring various benefits, including improved indexing of conference papers by Google Scholar and other indexing services. You may notice that old links to these conference proceedings are currently broken. Please note that most of the proceedings can be found at a temporary new home: https://www.mitpressjournals.org/loi/ecal. This is work in progress, and we will post a further announcement when the process is complete. In the meantime, please accept our apologies for the disruption.