This product was built to be a bridge between Sonos and Crestron. [Link: lodeaudio.com] Not sure what it costs or where they are in terms of development and support.

Crestron has a couple of products that can provide some streaming music. CEN-NSP-1 [Link: crestron.com] and the CEN-TRACK with the AUDIONET Card [Link: crestron.com].

A better option IMO would be the Autonomics Mirage MMS2-A at apx $2000 retail. [Link: autonomic-controls.com] Here you can see the available streaming services. http://www.autonomic-controls.com/