"So you don't support corporate environments now?"
I don't know what you mean by that; nothing has changed. Flash Player installations always required an Administrator account, and there was always an offline installer without bundled software.
And no, there is no email distribution list that announces software updates. Flash Player updates itself if no manual update is performed.
One release prior to this version, the installer didn't delete itself at the end of the install. Now it does. They used to let other places host their files like Filehippo. Now they don't. And the e-mail list is more of an installation on new PC builds type of thing and I also own a computer repair company the other half of the day so I was more talking about that but regardless, they never approved my account. They asked specifically how many PCs I build and what my business is like, etc and then ignored it. And now the flash installer I keep on my USB flash drive self destructs so I have to copy it every time. How convenient. What are they thinking?!
And no, flash does not update itself. It tries to and it breaks unless it's running under and admin account. They should really fix that.
You can download offline installers that won't delete themselves when finished here: http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html#mai n-pars_header
We provide older versions (along with the latest releases) over on our archive page: http://helpx.adobe.com/flash-player/kb/archived-flash-player-versions.html
As for auto updating, during silent updates Flash Player does not require an admin account to update.