We had two disappear in quick succession shortly after migrating to ec2 a couple of months ago (one running postgres and one varnish), but nothing since.

I agree, but still applaud Manu's release of something many consider so private.

Even though this isn't a genome sequence, there is potential for interesting analyses if lots of people release their 23andme data. (I believe 23andme use the same SNPs for every user).