For health reasons, I am unable to go to all but the geographically closest conferences and so have had to turn down a number of invitations over the last 4 years or so to give keynote addresses, or to take part in panel discussions. However, I now have the possibility of contributing directly from my computer at home using Skype to another computer using Skype, cost-free. My Skype address is jim.kemeny22. Contributions to other time-zones can, if necessary, be  sent in advance to be recorded and saved for playback. Email me for more information.