Release of Core Packages are the result of a bug being resolved at Bugzilla, may it be for version 7.xx or version 8.xx. A similar situation exists for contribs. If you wish to follow developments, Create an account at Bugzilla and configure bugmail to include all categories of interest to you. You can do this by accessing:
http://bugs.contribs.org/userprefs.cgi?tab=email
I would tick most of the squares, except the last two lines at the bottom, in this way, you will get everything.
Be prepared to receive a good number of emails each and every days. It may be a good idea using a dedicated email address for this of you can, separate from your private email address. Any question, just ask.
All the best!