Last week Canonical launched the Ubuntu One Files app for Android. According to a Canonical spokeperson: "The Ubuntu One Files app means that you can sync your files, photos and more with you and manage them on the fly." According to me it means you can take a pic on your phone or tablet's camera, and immediately view it on your PC. It also means you can upload a file or photo to your mobile device without it having to be anywhere near your PC.
Ubuntu One Files gives you access to everything, everywhere
In use it's pretty straightforward. Once I'd installed the app on my Samsung Galaxy Tab, I had the option of putting all the photos already on the device into my Ubuntu One account. I chose not to (no-one wants to see *those* pics), but from then on whenever I have taken a pic, one of the sharing options is to upload to Ubuntu One. A single click, and almost instantaneously the image is accessible wherever I have a web connection. SO that's an immediate backup and an opportunity for sharing.
You can upgrade from Ubuntu One Basic to the Mobile service for $3.99 a month. This allows you to stream your entire music collection to your mobile device.