I’ve been trying out Mozy for backup for a while (the free version limited to 2GB of storage).

I recently upgraded to the mozyhome edition, it’s only 5$ each month for unlimited storage, but only for ONE computer.. And since I’m cheap and there is no Linux client, I just mirror the things from the server I have to back up in a directory on my windows PC (SVN repository, postgres database, web server config/logs/etc).

Uploading the initial data (22 GB) took around 3 days, but the incremental backups are much quicker.

I like that Mozy stores several versions of the file, so I can roll back to a specific date. They only save the different snapshots of files for a month, but for the important stuff I have SVN which lets me do unlimited rollbacks anyway.

update April 27th 2009
I recently managed to corrupt a 30 MB file and had to restore it. unlike the upload of the data, restoring it (downloading) was extremely fast, got around 6 MB/s download speed

update April June 6th 2011
Mozy stopped with the unlimited plans, making me get a 125gb plan at twice of what I paid before. So obviously I’m switching to CrashPlan when my mozy account expires. The Crashplan client is much better (allows it to also back up to a local drive, or at a friends computer), and they offer unlimited upload at the same price as mozy 50 GB.. They also have a family option that includes up to 10 computers. It also seems like you can install mozy on both your stationary computer and laptop, and have the laptop backup stuff to your stationary computer, which then backs up to the crashplan servers. Also Crashplan supports linux