As a traveler, both backpacker and cruiser, I love Dropbox. It allows me, and anyone, to create a file, whether photo, movie (up to 180mb), note, or other document, to sync to you Dropbox folder on the Internet for safe keeping. That way you can access it from your tablet, smartphone, laptop and/or desktop. If your device is lost, stolen, or damaged you will be very happy you didn’t rely on keeping your info only on that device!
There are versions of the app for various devices and for computers as well as the web interface. Each works a bit differently and as I write this you must work with the website and the mobile apps in tandem to achieve things. They are working on the apps and welcome feedback. They are also great about helping us.
I may post a few tips or findings about the iPad or iPhone app here as I have time. I am not sure I will be able to keep up with their development though so I may not always be accurate.
Bug: When you choose a folder to upload to, the selected folder is not reflected. The previously uploaded-to folder remains reported. The Dropbox engineers are aware of the problem and are working on a solution.