Yes I definitely want to make that integration work. As it stands it's a bit of a pain since it's not included in Spotify's connect API. I have a Sonos so I feel your pain.

A quick fix (if you run OSX) is to download the Mac App and then direct your Spotify App to your Sonos speaker. Then it will work as expected. For now thats the only way to hook them up w/o a wire.

I've been playing JQBX over Sonos as Jason described. It works pretty well. It does seem that the app player is needed for this as the web player will play one song over Sonos and then revert to playing on the device where the web app is running.