I want to listen to the music I uploaded to my ubuntu one music account on my xbox 360. The windows streaming is ok, but it doesn't always work.
At this time, there is no native support for streaming. You may be able to find some sort of homebrew app or API that can help you stream. A temporary solution may be to just burn the music to a CD-R and put it in you Xbox. This will launch a process that allows you to save the music onto the HDD. The benefit to this is the ability to listen to music whilst playing a game, which is currently impossible to do with streaming alone (on the Xbox, anyway).