I maintain a few Python-based web apps. I need to be notified immediately when new Python releases are made, especially micro level releases that fix security issues, so I could update my sites to use the new version.
Is there any way to be automatically notified? I looked at python-announce-list but it has notifications for a myriad of open-source projects that I'm not interested in.
As Michael Hampton pointed out, the Python folks maintain an RSS feed of their updates and changes to the core interpreter/language.
This is more than just security fixes, but if you stay on top of all the Python changes (which aren't that high-volume, judging by the feed) you'll know about any security updates as they happen.
Have a look at the news section of the Python website, which mostly talks about latest Python releases. It has an RSS feed. You could also follow @pythoninsider on Twitter.