Non Stop Mac has
put together an ingenious how-to on creating an Automator
action to backup files to Backpack. It's a simple process that uses the genius of Backpack's page-specific email
addresses to email files that are sitting in a specific folder. Head over and check out their post for the full
details, as it really isn't difficult to create a system for keeping your stuff backed up, online and accessible.
However, don't forget: free Backpack accounts (to my knowledge) don't allow for hosting files or images.
I actually have an amendment to offer up for Non Stop Mac's Backpack backup process. While I haven't tested this out yet, it should work in theory: instead of saving this system out as an Automator action, I bet you could save it as a folder action, then simply attach it to a folder of stuff you want to back up. In a sense, this might be a basic, one-way iDisk: you could (theoretically) save items to this folder, which would then automatically be emailed to Backpack. If you try any of this out, feel free to share your thoughts on the experience.
[via Backpack blog]