I love Dropbox, I use it for just about everything. I also use WordPress for most of the sites I maintain. It’s easy to use and configure to my needs. I have been maintaining a backup of the sites databases and files, all manually. Every week I fire up my trusty FTP application of Transmit and sync the site to a local folder on my computer. I knew there we automated ways, but I also wanted away to add it all to Dropbox for more redundancy, which I could have done with the previous way through Transmit. After a little searching and enter the wonderful plugin WordPress Backup to Dropbox (WPB2D). It copies the files and backs up the SQL databases right to your Dropbox account. You can adjust frequency, location and automation. With a subscription you can also enable zipping the site and email confirmations.