Is it possible to have a fall back OpenID provider on your own domain? So that way if you're on a computer away from the one hosting your oID server and somethi

Is it possible to have a fall back OpenID provider on your own domain? So that way if you're on a computer away from the one hosting your oID server and something happens to it, the consumer can gracefully fall back to a secondary provider. I think it would be really cool to use Opera's Unite as an oID provider, but there's no guarantee you'll be able to run Unite (e.g. on school/work computers)