What about a Ubuntu One client for WebOS?
This an awesome operating system.
Already have a Pre phone and I'll have the TouchPad.
Are you planning to release a WebOS client soon?
We don't have any plans to work on a WebOS client, but we'll happily support any community effort to do so, our APIs have been published: https://one.ubuntu.com/developer/
I don't know if they are working on a WebOS client, but you could easily access your files in WebOS by simply logging in from the web interface.