We confirmed in December that Sonos was testing an official Windows Phone app for their service.
Now Microsoft Place has been able to find the app in the Windows Phone Store, which still seems to be in early stages of private testing.
Despite this however internal reviews are good, with one reviewer saying “So far a very good experience.”
Hopefully the app, which appears to have been in testing for at least 4 months, will hit the store soon.
You can see but of course not download it from the Windows Phone Store here.