I don't know of a specific resource.

A lot of people are scared (semi-justified) of data deduplication. It's a somewhat new technology and it can be a little sketchy, but I'd say it's no more dangerous to use than any other storage mechanism. Database backups can be corrupted by any number of things, not just dedupe. Dedupe just adds another to the list. So the rules are still the same. Take your backup, test your backup, but, have a second copy off-site on a regular basis to some other storage location.