I pushed all the way through. I'm signed up with Alcor, but feel very much as you do about how hard signup was, and how unlikely it is that Alcor will survive very long. I know only one other Australian who tried to sign up, and he also gave up in frustration.
(I've tried to volunteer my time and efforts to Alcor, and they can't organise enough to accept my help.)
Potentially of interest to my fellow antipodean LessWrongers. Stasis Systems Australia is a company seeking to start a cryonics facility in Australia. Their website is pretty sparse, but they just sent out a mailing list update on how they are going, and it doesn't appear that the information therein is located in any news section of the website, so I thought I'd post it here.