That's awesome news. Just being able to take a folder on my Drive, and say, "Archive this 5 Gigabytes of photos for the next 50 years" - and know it will cost me around $30 (and, as time goes on, likely less as the storage drops) and I won't have to worry (much) about it, will be a big win - even if you don't come up with an easy way of integrating with the normal S3 backups - I bet a lot of people will love that feature.