There's a lot of controversy right now about how beneficial it will be to move our computing to the "cloud", which means becoming more dependent on others for access to our data, and for its security. There are several cloud alternatives out there already, but I think that so far they are proprietary. I, for one, would feel more comfortable with a "disk drive on the Internet" that was provided by truly open software. In the long run, I would expect such a "cloud" device to be more reliable and more secure.
Best of all, I have a good name for an open source "data in the cloud" device: Gnuage.