Multiple URLs on this blog point to the Tianocore EDK2 development mailing list for more information.
https://lists.01.org/mailman/listinfo/edk2-devel
However, there’s a few broken links on the archive page for that list.
Here is more info on some changes to the list archives:
https://lists.01.org/pipermail/edk2-devel/2016-July/000000.html
Here is another source of archives of the list:
https://www.mail-archive.com/edk2-devel@lists.01.org/info.html
Thanks to the edk2-devel-owners for a pointer to this alt archive site.