I am mentioning rsync.net because I am a customer that wants to see their business thrive. Take a look at their philosophy and their privacy/warrant policy and you'll see why ...

I use rsync (and Unison, and sftp) to automatically backup my most important files to a 4 GB offsite filesystem at rsync.net, which they in turn replicate to their secondary loccation in Colorado.

It's a great solution. You should check them out.