I'm happy to say that we released Notifications on another two dozen wiki sites today: Albanian, Arabic, Azerbaijani, Belarusian, Bulgarian, Chinese, Croatian, Czech, Finnish, Galician, Greek, Indonesia, Latvia, Lithuanian, Malay, Norwegian-Nynorsk, Serbian, Slovak, Slovene, Sorani Kurdish, Thai, Turkish and Welsh Wikipedias. (1)
We also released a couple bug fixes, such as a popular community request to show all diff links in bundled messages. (2)
So we have now successfully released the Echo extension on most of the large Wikipedias and dozens more around the world -- with very positive community response, as summed up in last week's blog post: https://blog.wikimedia.org/2013/10/01/notifications-launch-on-more-wikipedias/
Based on this favorable feedback, we now plan to release Notifications on most remaining wiki sites in a single day, on Tuesday, October 22. This includes about 200 Wikipedias we haven't enabled yet, as well as about 500 'sister projects' in all languages (e.g.: Wikibooks, Wikidata, Wikisource, Wikispecies, Wikiquote, Wiktionary). This represents about 700+ sites total, leaving only a few wikis disabled, at their community's request.
If you are active in a community that doesn't have Echo enabled yet, we would be grateful if you could invite volunteers to help with translations and other tasks in our release checklist. (3)
If you have any questions or comments about enabling Echo on your site, please leave them on our release discussion page (4), or contact me directly.
Many thanks to our community liaison Keegan Peterzell and our developer Benny Situ for all their hard work on these final releases. :)