Spotify and other streaming services work. However, I have only verified Spotify using the 3rd party server plugin. I have the Boom and Receiver devices myself, and they do not support Spotify on their own hardware. It should work on the Radio and Touch devices though.

Using mysqueezebox.com (SqueezeNetwork) as server is on the to-do list, but it isn't supported at the moment.Currently you need to have a local server.