although I'm not aware of any significant advances since vitrification replaced freezing.

Just a couple of months ago I asked Max More about that very topic. He didn't have much that was very informative to say. I also asked that question back during the time when Regina Pancake was their responst-team coordinator, to a similar response. I know Hugh, Mike, et al, are "working on it" -- but I haven't heard much convincing there. Their current attitude seems to be that the toxicity problems of the vitrification agents are a non-issue in the face of potential destructive-scanning uploading solutions.

I, for one, am not sufficiently convinced that their preservation strategy ensures that as an option, to the degree necessary to actually preserve my me-ness as I today know it. So I haven't signed up.