We used to send an email to wikitech-l every time we approved new Subversion committers, but now that we've switched to Git, I don't do that anymore. We've welcomed at least a hundred new people to our developer community since the Git switch two months ago, and you can see most of them at https://www.mediawiki.org/wiki/Developer_access/Archive . Welcome to all of you!
We've also given some folks Gerrit project owner status so they can merge in changes to MediaWiki core or to certain extensions; see https://www.mediawiki.org/wiki/Git/Gerrit_project_ownership/Archive for that list. Explanation at https://www.mediawiki.org/wiki/Git/Workflow#Who_can_review.3F_Gerrit_project... .
Incidentally, right now the queue of people waiting for developer access accounts (Git/Gerrit and Labs access) is empty, as is the queue of requests for Gerrit project ownership. Feel free to add yours!
https://www.mediawiki.org/wiki/Developer_access
https://www.mediawiki.org/wiki/Git/Gerrit_project_ownership