Mozy is one of the most affordable online backup solutions on the market. Their Pay as You Go Model is easy to understand and offers value for money.
Server Licenses: $6.95 + $0.50/GB per month
MozyPro can be a nice, inexpensive addition to a backup program. It's one of the most end-user-friendly systems.
However I found myself working many, many issues where backups didn't complete or were slow.
This was in 2009. Newer versions may be better but I wasn't impressed or confident that it was working or recoverable.
Yup, does what it says. :)
While not terribly easy to setup on the mozypro side, the software itself is very easy to use for backups as well as restores.