The new database machines I ordered are now installed and spinning up. They're in the beginning phases of their life, which means I've moved a few test accounts (a few communities and some other random people) and will be watching how they behave over the next day or two to make sure that everything is happy.
The new database cluster has been christened Epsilon Eridani and will soon be the home for all of our users.
You should really not expect to see anything yet, but take this post as fore-warning that sometime soon (I'll post again) I will start moving accounts in earnest. You can expect brief bouts of "read-only mode" when this happens, so if you see that starting to pop up around the site in the next few days -- that's why!