Aquarius wroteThis has been talked about already here, and the Rune guys have it on their roadmap. I don't know how complicated it is to integrate, though. Now that spotify is done, maybe other streaming services will be easier to integrate.
A note on Qobuz:
The android control App "Bubble UPNP" now has access to your qobuz library (with your account credentials, of course), so you can stream to any DLNA renderer (such as Rune) what you have access with your Qobuz account: your purchases, streaming, etc...
It works flawlessly on local rending (plays on phone) over 3G and also on my local wifi network streamed to RuneAudio (rasp B + Hifiberry Digi) or my Hifi Streamer (Atoll ST200).
EDIT: I have the basic 5€/month subscription and it seems that, for streaming, I only get to stream 30s samples in mp3/320 instead of the full song like I have on the desktop (qobuz player on my browser). So I guess Qobuz considers that it's a "mobile" usage and applies restrictions accordingly. (consistent with
this page)