Also, there is a distinction (for those of us who believe MWI) between the probability that an average person frozen today will be revived (as measured in Everett branches where they get revived) and the probability of being revived from that person's perspective. It seems to me that cryopreservation is the one clearest quantum suicide situation, and that the subjective probability of being revived should equal 1 if there is any Everett branch in which you are revived.