He's speaking at AmCham on this trip I know - maybe some other places.
http://www.amcham.org.hk/events/noti...21_patten.html
I saw him at the FCC on his last visit. He hasn't half aged! But once he got into his stride he gave a mildly amusing and entertaining speech without saying anything of any substance at all (thus proving himslef to be very much the diplomat).