Out of the blue, I got an email from one of my current domain name registrars. It seems they're offloading their .au domain name registration business to another business (been through this before, at least this time I'm being told in advance). The email correctly listed all the .au domains I hold with them, but had no web link to an FAQ, or to the receiving registrar.
UPDATE: Rebel published an FAQ.
UPDATE: Seems Rebel borked at least the technical contacts in the transfer from themselves as registrar, to Domain Directors as registrar and them as reseller.