Ok, I've done a little tour of the Config Tool... Now I can reply to myself :
The Config Tool has a new BeoSound5 xml file where we can see that there are a lot of non-IR functions...
BUT the http (or other protocol) commands are hidden in the Beo6 firmware : the XML only tells to launchpre-defined functions embedded in the Beo6.
That means that for now, I can't imagine any way of using the Beo6 to control non-B&O wifi-controlled products.
Other thing that I've discovered with the new firmware: the navigations through sub-pages are not circular again : if you go to the last page, a touch on the same arrow doesn't brings you to the first page.