I used to use Mozy for online backups, but a combination of them upping their prices/cancelling the unlimited plan and the sheer amount of time that it takes to upload data meant I switched to a hard drive base solution.
However, I also use Photoshelter to back up my processed jpegs (although they do accept raws/DNGs/PSDs etc) and run my website. It can get costly to store that much data, but you only have to upload once, or you can mail them a hard drive to get the initial upload sorted out without it taking a few weeks!