Great work. Thank you for the effort.
Yes, we can setup an edit-this-page for the newsletter, or we can wait a week or so, and setup a blogger package instance after openacs.org is updated to 4.6.3. I am not sure which option is better. I suspect blogger, in that RSS and notifications will come for free.
Malte, of course notifications can be added to ETP. Unfortunately noone has done this work yet :)