Realist,
You should elect to receive all your mail via e-mail through your share registry (Computershare etc.) but you'll still need someone 'on the ground', at your 'registered address' to take care of important correspondence such as dividend cheques and share entitlements. This is how I've been doing it and it's working out ok.
The tricky part is tax. I briefly looked into it and got the gist that if you're getting fully franked dividends you're ok, and that you should try to stay below the lowest income tax level since you're out of Australia and not a resident paying tax. I too need to look into this further as my portfolio is growing a little too big to stay under the radar without knowing exactly what I need to do.
Cheap long distance moving companies
page G&J Moving.
If anyone knows differently I'd love to know - (mine is not accurate advice).
Ty.