You mention on your site that the servers are in "an N+1 redundant environment". Is it your own data center or is that outsourced?
Also, I would second jgrahamc's question re: encrypted backups.
Also, I would second jgrahamc's question re: encrypted backups.
Regarding the encryption: the files stored are not encrypted, it is your task to encrypt them, with whatever method you choose, as I believe this removes some of the limitations I might impose if I were to forcefully encrypt everything, though I understand this can make it harder for newer users that are inexperienced.