Just to be clear, Dropbox isn’t backup software; it’s a syncing service. If you delete a file and that change is synced, and your file no longer exists.
I really love the things you can do with Dropbox. And since I’m stingy, I wanted to use Dropbox for backing up–and more importantly–restoring my computer… More at JACOB SALMELA.
An unusual, and potentially useful, idea.