> But note, I want to be able to safely backup my entire digital collection wherever I choose. Perhaps backing up the Amazon Glacier, or something like that. I don't trust that a new dotcom is going to necessarily survive.

I completely agree. One of the features that I love about Picturelife is the ability to setup your own storage. Instead of paying for the service, you can connect it to an Amazon S3 bucket. All the photos you upload are stored in a bucket that you own and you only pay the S3 bills.

Then, because you have complete control and access to the bucket itself, you could setup a backup to Glacier every week or something.