Last modified: 2014-08-13 14:07:23 UTC
So messages can be posted and users can opt-in/out in a more systematic way (instead of/in addition to the current user talk page editing method).
Dupe of bug 56361 / bug 56362?
The WMF core features team tracks this bug on Mingle card https://mingle.corp.wikimedia.org/projects/flow/cards/489, but people from the community are welcome to contribute here and in Gerrit.