I was suggesting it might be nice to have a forum doc that explains how to use this class of interfaces. Part would be the developer side (set your gadget up like this (and why), then the slot shows up here, then your app is setup like that) and part the user side (connections and disconnections). Something that connects all the dots for someone wanting to work with these interfaces.
Eg, today we only have something like this for the content interface (though it is not complete). I plan to write something up for dbus, network stuff and desktop stuff. I was thinking perhaps CE could for devices since you have the most experience with them.