Does anyone know how the notifications system in Harmattan works? It looks like there is a general notifications screen where all new messages show up (google chat, twitter, facebook, sms, etc?). What happens when you click on one of them? Does it open the application it is associated with?

If anyone has a device, I would be interested to see how replying to something like a google chat or facebook chat message works (new window for each person you are chatting with, or a common window for everyone). I have an idea for an app, but I am struggling to understand the notifications system, and how it compares to maemo5.