In particular, the GitHub organization name has just changed, and with it, some repositories. It's possible but unlikely that this has broken some links or bookmarks. Any Git repos you have should transparently push to the new locations, thanks to GitHub's excellent redirects, but it's still a good idea to update your remote URLs if applicable.
In the near future, this mailing list's name and address will change and we'll all migrate to a new IRC channel once we have logging and such set up. Updates will be posted to this mailing list as things happen, or you can follow along in
https://github.com/portier/portier.github.io/issues/19