I know there are few people that have in the past wanted to integrate sonos with indigo.
Not sure if people have seen the thread on the sonos site, but Henkelis has been working on a python/upnp controller. It has an optional browsers front end, but apparently can be directly accessed or controlled from AppleScript.
http://forums.sonos.com/showthread.php? ... post117602
My python is non-existent, but thought someone might be interested. The code is not on line yet, but he is emailing it out on request and it works perfectly on my mac and can be accessed from iPhone/iPod/touch etc.
It's a very early version but it works and seems to me this could provide the link for direct control from indigo
Mat