We reviewed Ubuntu one back in January (http://www.k12opensourceclassroom.org/?p=196). At the time, they wanted to create a DropBox challenger, a tool that would sync files across computers, across networks. I never really used Dropbox, and I do not use Ubuntu One Regularly, but the new stories I hear may change that. Seems you can stream music from Ubuntu One to your mobile phones (even my EVO!), and the Windows client is coming!
That would make a lot of sense for schools. I know some districts that really moved from file servers in favor of tools like Dropbox, Google Apps, and other things. I think a annual fee for say, 5GB per student, would make a lot of sense. We would not need to keep up with servers as much, students would need to manage their space, and less work for all involved. Another key use would be as a digital locker, for things such as volunteer logs and senior projects that students must keep from year to year. The opportunity of keeping it in the cloud holds promise, letting students access from home as opposed to setting up VPNs or other solutions.
They also released their mobile app on October 7th. This allows you to stream your files to any Windows, Android, or iPhone. Cool. I like the idea of streaming my music to my phone. I will need to check this out. You will probably run out of space from their free 2GB quickly, but for $30-50 a year for more storage, I think that would be worth it for many people.
Lots of creating over at Ubuntu. I applaud the open source community, continuing to innovate for us. Yes, others do as well, but an Ubuntu app for Windows? That, is, cool!