A great project got recently funded in Kickstarter: Tubecore Duo!
It’s basically a compact yet powerful, tube driven bluetooth speaker, WiFi enabled that runs VOLUMIO, XBMC and other distributions and can stream music and HD movies.

The compatible computers are Raspberry Pi model B and UDOO Quad but in a recent update the 53% of their kickstarter backers have upgraded to the UDOO board in the first 7 days.

If you need some more info or want to preorder Tubecore Due please visit their website.