Migration and SEO issue – Australia

Hi! I am a WPMU DEV member (but site is hosted elsewhere). I have just realised that you guys now offer hosting as part of membership, so was just going to ask about your free migration service?
Also, as I am based in Australia, I just wanted to know if the fact that there is no Australian data centre available, if this would impact on my Australian-based google rankings (or is there a way that we can overcome this?)
As far as I understand, page speed probably more important in terms of SEO anyway?

Sorry if I’m asking very basic questions, used to do a lot of site creation and SEO stuff – but haven’t touched this area for a few years now.