This is certainly intresting:

http://www.wegotserved.com/2010/09/02/sonos-spotify-team-bring-8-million-tracks-home/

In short, a software update to the Sonos multi-room system will enable access to music from Spotify, including personal playlists etc. That would definately be nice to have on the BeoSound 5, in combination with MOTS!

Doesn't BeoSound 5 use a customized Windows XP platform? If so, it should be pretty easy to integrate Spotify, at least from a technical point of view. If Sonos can team up with Spotify, B&O should be able to too.

Mattias