Testing v5.0.26 on a new server, and my conversation with Support indicated that it is release, but they are setting the Update Notice in groups, so that support is not overwhelmed with everyone upgrading at once.
I'd second the suggestion to have on-site copies of the installer, tuner, and DB backups so that you have everything you need to do a re-install without an Internet connection.
In this case, we are upgrading the server, so we did the install, restored from a recent DB backup, and then ran the tuner.
No hiccups, and the practitioners will be looking at the new version this week with practice data before we actually do the production upgrade.
