Well, if anyone finds out anything, or succeeds in doing it, I'd like to know, too. I registered a domain with them, more to try it out than anything else. I decided that the domain would be useful at least for e-mail, but I'd like to register it through mydomain.com (namedirect or something like that), just to support that service. I don't anticipate needing to register a lot more of my own domains in the near future, but I figure I could transfer that one there.
But if that doesn't work out..where is the current information at Domain Zero about renewing registration? All I can find out there is about the paid plans for hosting or redirection.
One more that I've been wondering about..what happens if your registrar disappears? Like if Domain Zero tanks..or some of the others..what happens to the domains?