I vaguely remember some LessWrong users talking about contacting Pratchett and informing him about the possibility of cryopreservation. Did anyone try?
Since he's already been afflicted with Alzheimer's for some time, if he were going to have himself cryopreserved, it would have been better to do so much earlier.
http://blastr.com/2011/06/terry-pratchett-begins-fo.php
Another great mind that will be needlessly lost forever. :(