I have created a dedicated account for Masto.host and you can follow it here: @mastohost
I will start doing the announcements there (will boost them here).
This way if my servers go down there will still be a place where you can go to see what is going on. Plus, I feel more comfortable asking new people to follow that account to get announcements and they don't have to follow me.
I have also created a Status page so anyone can see what is the status of the servers: http://status.masto.host/