Since this initial foray into Dropbox I have been using it for other purposes. I helped a friend share images of his grand daughter with his father (great grand dad) using the folder sharing. I also started to need to put more sensitive information between machines so I started experimenting with integration of TrueCrypt and Dropbox.
The general idea is to create a Truecrypt volume on a file which is within dropbox. When mounted the filesystem can be treated like any other through the mount point. Once the volume is unmounted Dropbox will synchronize it. Not only that but it does this quite intelligently only transferring the delta rather than the whole drive.
Now playing around with the Wordpress, Dropbox and TrueCrypt to see if I can create a distributed private journal.