A list you can now subscribe to:
https://lists.wikimedia.org/mailman/listinfo/ee
Discussion of initiatives that support new users and experienced editors
on Wikipedia and MediaWiki projects ("Editor engagement" & "Editor
engagement experiments"). So, for instance, right now they're talking
about Echo (the automated one-to-many notifications system), and I
figure that they'll be talking about Flow (the user-to-user
communication & subscription & commenting system that).
Added to
https://meta.wikimedia.org/wiki/Mailing_lists/Overview#Interest_areas .
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Sumana Harihareswara
Engineering Community Manager
Wikimedia Foundation