Hi Ben, all,
Here are a few organisations i've collated over the years might be a bit dated though
FWIW some aikido orgs are more closed than open, some that were quite closed are now more open and vice versa over time. I have found though that regardless of organisation budo people serious about getting better end up congregating and so there are all these ura kind of relationships between individuals that transcend organisations.
Hopefully what is happening in the USA (which is perhaps generationally ahead in aikido organisations) might be come more the norm here. Certainly when looking at smaller eco systems there is a lot of support for when a teacher comes out from Japan (or elsewhere) to visit them and being only 8hrs from Japan .
I went to a seminar in Adelaide (back when it had a Yuishinkai dojo there run by a good friend) and witnessed a delightful budo network and to this day I'm not sure who organised the seminar http://www.aikidorepublic.com/trip-a...ikido-adelaide
best to all and look forward to what you come up with