You can also use viivo which encrypt the files on the client side

Or simply use EncFS encrypted file system and sync the sync files to Dropbox. See this: http://ninjatips.com/encrypt-d...

I usually walk my dogs around the Tropicana Field where the Republican National Convention will be holding the cocktail party. They turned Tropicana Field into a fortress. I guess i have to find another spot to walk my dogs. I don't think I would make it through all those barricades without an invitation. :(