I've wondered about this, but never asked. I saw this post to the forums that really does not answer my questions - nor those of the person that posted this request:
Throughout the support forums (on every page), there is a signup box for the "Announcement List:" emails.
I have signed up for that list at least twice. Honestly, I do not ever remember receiving a single email. I've checked the spam folders, too, just in case it somehow got tagged. But, I don't know what the address it originates from is, so I'm not sure if I'm searching for the right thing.
Is the list used? Has it ever been used? Was it used to announce 2.2?
If so, how may I assure my email address is on the list?
The address it comes from would help so that I may flag it as an important email I should check. And, to make sure it never gets tagged as spam, will someone please share the "From:" email address for the list?
I want this kind of announcement because I, and many others I know, typically mod the admin area to use other RSS feeds, not the WordPress development blog feeds.
That email announcement list will make it much easier to keep up with security issues and new version releases.